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Finding the Fourth Proportional to 57,139.20, 85,708.80 and 26,035.20

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Solution

The fourth proportional to 57,139.20, 85,708.80 and 26,035.20 is: 39,052.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,139.20 : 85,708.80 = 26,035.20 : x
  2. Step 2: Convert to fraction form
    57,139.20/85,708.80 = 26,035.20/x
  3. Step 3: Cross multiply
    57,139.20x = 85,708.80 × 26,035.20
  4. Step 4: Simplify right side
    57,139.20x = 2,231,445,749.76
  5. Step 5: Solve for x
    x = 2,231,445,749.76/57,139.20
  6. Step 6: Final answer
    x = 39,052.80

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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.