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Finding the Fourth Proportional to 57,517.65, 86,290.80 and 45,715.95

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Solution

The fourth proportional to 57,517.65, 86,290.80 and 45,715.95 is: 68,585.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,517.65 : 86,290.80 = 45,715.95 : x
  2. Step 2: Convert to fraction form
    57,517.65/86,290.80 = 45,715.95/x
  3. Step 3: Cross multiply
    57,517.65x = 86,290.80 × 45,715.95
  4. Step 4: Simplify right side
    57,517.65x = 3,944,865,898.26
  5. Step 5: Solve for x
    x = 3,944,865,898.26/57,517.65
  6. Step 6: Final answer
    x = 68,585.31

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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.