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Finding the Fourth Proportional to 52,489.72, 78,747 and 20,901.61

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Solution

The fourth proportional to 52,489.72, 78,747 and 20,901.61 is: 31,357.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,489.72 : 78,747 = 20,901.61 : x
  2. Step 2: Convert to fraction form
    52,489.72/78,747 = 20,901.61/x
  3. Step 3: Cross multiply
    52,489.72x = 78,747 × 20,901.61
  4. Step 4: Simplify right side
    52,489.72x = 1,645,939,082.67
  5. Step 5: Solve for x
    x = 1,645,939,082.67/52,489.72
  6. Step 6: Final answer
    x = 31,357.36

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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.