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Finding the Fourth Proportional to 57,131.60, 85,697.40 and 38,469.20

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Solution

The fourth proportional to 57,131.60, 85,697.40 and 38,469.20 is: 57,703.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,131.60 : 85,697.40 = 38,469.20 : x
  2. Step 2: Convert to fraction form
    57,131.60/85,697.40 = 38,469.20/x
  3. Step 3: Cross multiply
    57,131.60x = 85,697.40 × 38,469.20
  4. Step 4: Simplify right side
    57,131.60x = 3,296,710,420.08
  5. Step 5: Solve for x
    x = 3,296,710,420.08/57,131.60
  6. Step 6: Final answer
    x = 57,703.80

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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.