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Finding the Fourth Proportional to 72,938.27, 109,425.86 and 20,347.72

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Solution

The fourth proportional to 72,938.27, 109,425.86 and 20,347.72 is: 30,526.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,938.27 : 109,425.86 = 20,347.72 : x
  2. Step 2: Convert to fraction form
    72,938.27/109,425.86 = 20,347.72/x
  3. Step 3: Cross multiply
    72,938.27x = 109,425.86 × 20,347.72
  4. Step 4: Simplify right side
    72,938.27x = 2,226,566,461.04
  5. Step 5: Solve for x
    x = 2,226,566,461.04/72,938.27
  6. Step 6: Final answer
    x = 30,526.72

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1.5x scale

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.