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Finding the Fourth Proportional to 81,415.62, 112,352.90 and 45,605.97

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Solution

The fourth proportional to 81,415.62, 112,352.90 and 45,605.97 is: 62,935.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,415.62 : 112,352.90 = 45,605.97 : x
  2. Step 2: Convert to fraction form
    81,415.62/112,352.90 = 45,605.97/x
  3. Step 3: Cross multiply
    81,415.62x = 112,352.90 × 45,605.97
  4. Step 4: Simplify right side
    81,415.62x = 5,123,962,758.78
  5. Step 5: Solve for x
    x = 5,123,962,758.78/81,415.62
  6. Step 6: Final answer
    x = 62,935.87

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1.5x scale

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.