Home / 120,133,711,772.28-165,922,114,838.22-79,117,443,781.56

Finding the Fourth Proportional to 120,133,711,772.28, 165,922,114,838.22 and 79,117,443,781.56

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Solution

The fourth proportional to 120,133,711,772.28, 165,922,114,838.22 and 79,117,443,781.56 is: 109,272,687,900.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,133,711,772.28 : 165,922,114,838.22 = 79,117,443,781.56 : x
  2. Step 2: Convert to fraction form
    120,133,711,772.28/165,922,114,838.22 = 79,117,443,781.56/x
  3. Step 3: Cross multiply
    120,133,711,772.28x = 165,922,114,838.22 × 79,117,443,781.56
  4. Step 4: Simplify right side
    120,133,711,772.28x = 13,127,333,592,830,413,111,296
  5. Step 5: Solve for x
    x = 13,127,333,592,830,413,111,296/120,133,711,772.28
  6. Step 6: Final answer
    x = 109,272,687,900.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.