Home / 128,747,802.85-177,666,559.52-72,996,973.81

Finding the Fourth Proportional to 128,747,802.85, 177,666,559.52 and 72,996,973.81

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Solution

The fourth proportional to 128,747,802.85, 177,666,559.52 and 72,996,973.81 is: 100,732,757.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,747,802.85 : 177,666,559.52 = 72,996,973.81 : x
  2. Step 2: Convert to fraction form
    128,747,802.85/177,666,559.52 = 72,996,973.81/x
  3. Step 3: Cross multiply
    128,747,802.85x = 177,666,559.52 × 72,996,973.81
  4. Step 4: Simplify right side
    128,747,802.85x = 12,969,121,191,385,094
  5. Step 5: Solve for x
    x = 12,969,121,191,385,094/128,747,802.85
  6. Step 6: Final answer
    x = 100,732,757.41

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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.