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Finding the Fourth Proportional to 57,710.61, 86,570.88 and 20,267.47

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Solution

The fourth proportional to 57,710.61, 86,570.88 and 20,267.47 is: 30,402.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,710.61 : 86,570.88 = 20,267.47 : x
  2. Step 2: Convert to fraction form
    57,710.61/86,570.88 = 20,267.47/x
  3. Step 3: Cross multiply
    57,710.61x = 86,570.88 × 20,267.47
  4. Step 4: Simplify right side
    57,710.61x = 1,754,572,713.27
  5. Step 5: Solve for x
    x = 1,754,572,713.27/57,710.61
  6. Step 6: Final answer
    x = 30,402.95

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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.