Home / 128,304,083.60-192,456,125.40-82,387,581.20

Finding the Fourth Proportional to 128,304,083.60, 192,456,125.40 and 82,387,581.20

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Solution

The fourth proportional to 128,304,083.60, 192,456,125.40 and 82,387,581.20 is: 123,581,371.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,083.60 : 192,456,125.40 = 82,387,581.20 : x
  2. Step 2: Convert to fraction form
    128,304,083.60/192,456,125.40 = 82,387,581.20/x
  3. Step 3: Cross multiply
    128,304,083.60x = 192,456,125.40 × 82,387,581.20
  4. Step 4: Simplify right side
    128,304,083.60x = 15,855,994,658,829,884
  5. Step 5: Solve for x
    x = 15,855,994,658,829,884/128,304,083.60
  6. Step 6: Final answer
    x = 123,581,371.80

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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.