Home / 128,747,799.52-177,666,555-72,996,970.48

Finding the Fourth Proportional to 128,747,799.52, 177,666,555 and 72,996,970.48

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Solution

The fourth proportional to 128,747,799.52, 177,666,555 and 72,996,970.48 is: 100,732,752.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,747,799.52 : 177,666,555 = 72,996,970.48 : x
  2. Step 2: Convert to fraction form
    128,747,799.52/177,666,555 = 72,996,970.48/x
  3. Step 3: Cross multiply
    128,747,799.52x = 177,666,555 × 72,996,970.48
  4. Step 4: Simplify right side
    128,747,799.52x = 12,969,120,270,618,298
  5. Step 5: Solve for x
    x = 12,969,120,270,618,298/128,747,799.52
  6. Step 6: Final answer
    x = 100,732,752.86

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1.5x scale

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.