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Finding the Fourth Proportional to 113,470.62, 156,565.70 and 65,721.12

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Solution

The fourth proportional to 113,470.62, 156,565.70 and 65,721.12 is: 90,681.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,470.62 : 156,565.70 = 65,721.12 : x
  2. Step 2: Convert to fraction form
    113,470.62/156,565.70 = 65,721.12/x
  3. Step 3: Cross multiply
    113,470.62x = 156,565.70 × 65,721.12
  4. Step 4: Simplify right side
    113,470.62x = 10,289,673,157.58
  5. Step 5: Solve for x
    x = 10,289,673,157.58/113,470.62
  6. Step 6: Final answer
    x = 90,681.39

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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.