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Finding the Fourth Proportional to 57,121.60, 85,682.40 and 36,126.40

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Solution

The fourth proportional to 57,121.60, 85,682.40 and 36,126.40 is: 54,189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,121.60 : 85,682.40 = 36,126.40 : x
  2. Step 2: Convert to fraction form
    57,121.60/85,682.40 = 36,126.40/x
  3. Step 3: Cross multiply
    57,121.60x = 85,682.40 × 36,126.40
  4. Step 4: Simplify right side
    57,121.60x = 3,095,396,655.36
  5. Step 5: Solve for x
    x = 3,095,396,655.36/57,121.60
  6. Step 6: Final answer
    x = 54,189.60

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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.