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Finding the Fourth Proportional to 57,100.60, 85,650.90 and 38,438.20

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Solution

The fourth proportional to 57,100.60, 85,650.90 and 38,438.20 is: 57,657.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,100.60 : 85,650.90 = 38,438.20 : x
  2. Step 2: Convert to fraction form
    57,100.60/85,650.90 = 38,438.20/x
  3. Step 3: Cross multiply
    57,100.60x = 85,650.90 × 38,438.20
  4. Step 4: Simplify right side
    57,100.60x = 3,292,266,424.38
  5. Step 5: Solve for x
    x = 3,292,266,424.38/57,100.60
  6. Step 6: Final answer
    x = 57,657.30

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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.