Home / 85,967,712.80-128,951,569.20-74,770,272.80

Finding the Fourth Proportional to 85,967,712.80, 128,951,569.20 and 74,770,272.80

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Solution

The fourth proportional to 85,967,712.80, 128,951,569.20 and 74,770,272.80 is: 112,155,409.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,967,712.80 : 128,951,569.20 = 74,770,272.80 : x
  2. Step 2: Convert to fraction form
    85,967,712.80/128,951,569.20 = 74,770,272.80/x
  3. Step 3: Cross multiply
    85,967,712.80x = 128,951,569.20 × 74,770,272.80
  4. Step 4: Simplify right side
    85,967,712.80x = 9,641,744,007,072,078
  5. Step 5: Solve for x
    x = 9,641,744,007,072,078/85,967,712.80
  6. Step 6: Final answer
    x = 112,155,409.20

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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.