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Finding the Fourth Proportional to 67,673.52, 101,519.92 and 20,930

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Solution

The fourth proportional to 67,673.52, 101,519.92 and 20,930 is: 31,397.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,673.52 : 101,519.92 = 20,930 : x
  2. Step 2: Convert to fraction form
    67,673.52/101,519.92 = 20,930/x
  3. Step 3: Cross multiply
    67,673.52x = 101,519.92 × 20,930
  4. Step 4: Simplify right side
    67,673.52x = 2,124,811,925.60
  5. Step 5: Solve for x
    x = 2,124,811,925.60/67,673.52
  6. Step 6: Final answer
    x = 31,397.98

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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.