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Finding the Fourth Proportional to 67,613.08, 101,421.15 and 20,866

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Solution

The fourth proportional to 67,613.08, 101,421.15 and 20,866 is: 31,299.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,613.08 : 101,421.15 = 20,866 : x
  2. Step 2: Convert to fraction form
    67,613.08/101,421.15 = 20,866/x
  3. Step 3: Cross multiply
    67,613.08x = 101,421.15 × 20,866
  4. Step 4: Simplify right side
    67,613.08x = 2,116,253,715.90
  5. Step 5: Solve for x
    x = 2,116,253,715.90/67,613.08
  6. Step 6: Final answer
    x = 31,299.47

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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.