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Finding the Fourth Proportional to 81,537.66, 112,520.61 and 47,565.90

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Solution

The fourth proportional to 81,537.66, 112,520.61 and 47,565.90 is: 65,640.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,537.66 : 112,520.61 = 47,565.90 : x
  2. Step 2: Convert to fraction form
    81,537.66/112,520.61 = 47,565.90/x
  3. Step 3: Cross multiply
    81,537.66x = 112,520.61 × 47,565.90
  4. Step 4: Simplify right side
    81,537.66x = 5,352,143,980.27
  5. Step 5: Solve for x
    x = 5,352,143,980.27/81,537.66
  6. Step 6: Final answer
    x = 65,640.15

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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.