Home / 128,891,145.47-177,884,926.65-72,385,177.77

Finding the Fourth Proportional to 128,891,145.47, 177,884,926.65 and 72,385,177.77

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Solution

The fourth proportional to 128,891,145.47, 177,884,926.65 and 72,385,177.77 is: 99,900,051.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,891,145.47 : 177,884,926.65 = 72,385,177.77 : x
  2. Step 2: Convert to fraction form
    128,891,145.47/177,884,926.65 = 72,385,177.77/x
  3. Step 3: Cross multiply
    128,891,145.47x = 177,884,926.65 × 72,385,177.77
  4. Step 4: Simplify right side
    128,891,145.47x = 12,876,232,038,163,660
  5. Step 5: Solve for x
    x = 12,876,232,038,163,660/128,891,145.47
  6. Step 6: Final answer
    x = 99,900,051.25

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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.