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Finding the Fourth Proportional to 65,757.80, 90,734.10 and 38,901.44

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Solution

The fourth proportional to 65,757.80, 90,734.10 and 38,901.44 is: 53,677.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,757.80 : 90,734.10 = 38,901.44 : x
  2. Step 2: Convert to fraction form
    65,757.80/90,734.10 = 38,901.44/x
  3. Step 3: Cross multiply
    65,757.80x = 90,734.10 × 38,901.44
  4. Step 4: Simplify right side
    65,757.80x = 3,529,687,147.10
  5. Step 5: Solve for x
    x = 3,529,687,147.10/65,757.80
  6. Step 6: Final answer
    x = 53,677.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.