Home / 81,431.07-121,966.16-62,572.29

Finding the Fourth Proportional to 81,431.07, 121,966.16 and 62,572.29

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Solution

The fourth proportional to 81,431.07, 121,966.16 and 62,572.29 is: 93,719.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,431.07 : 121,966.16 = 62,572.29 : x
  2. Step 2: Convert to fraction form
    81,431.07/121,966.16 = 62,572.29/x
  3. Step 3: Cross multiply
    81,431.07x = 121,966.16 × 62,572.29
  4. Step 4: Simplify right side
    81,431.07x = 7,631,701,620.84
  5. Step 5: Solve for x
    x = 7,631,701,620.84/81,431.07
  6. Step 6: Final answer
    x = 93,719.78

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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.