Home / 128,304,059.60-192,456,089.40-82,387,557.20

Finding the Fourth Proportional to 128,304,059.60, 192,456,089.40 and 82,387,557.20

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Solution

The fourth proportional to 128,304,059.60, 192,456,089.40 and 82,387,557.20 is: 123,581,335.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,059.60 : 192,456,089.40 = 82,387,557.20 : x
  2. Step 2: Convert to fraction form
    128,304,059.60/192,456,089.40 = 82,387,557.20/x
  3. Step 3: Cross multiply
    128,304,059.60x = 192,456,089.40 × 82,387,557.20
  4. Step 4: Simplify right side
    128,304,059.60x = 15,855,987,073,930,814
  5. Step 5: Solve for x
    x = 15,855,987,073,930,814/128,304,059.60
  6. Step 6: Final answer
    x = 123,581,335.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.