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Finding the Fourth Proportional to 67,658.20, 101,487.30 and 20,925.40

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Solution

The fourth proportional to 67,658.20, 101,487.30 and 20,925.40 is: 31,388.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,658.20 : 101,487.30 = 20,925.40 : x
  2. Step 2: Convert to fraction form
    67,658.20/101,487.30 = 20,925.40/x
  3. Step 3: Cross multiply
    67,658.20x = 101,487.30 × 20,925.40
  4. Step 4: Simplify right side
    67,658.20x = 2,123,662,347.42
  5. Step 5: Solve for x
    x = 2,123,662,347.42/67,658.20
  6. Step 6: Final answer
    x = 31,388.10

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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.