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Finding the Fourth Proportional to 55,138.70, 82,708.05 and 40,277.90

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Solution

The fourth proportional to 55,138.70, 82,708.05 and 40,277.90 is: 60,416.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,138.70 : 82,708.05 = 40,277.90 : x
  2. Step 2: Convert to fraction form
    55,138.70/82,708.05 = 40,277.90/x
  3. Step 3: Cross multiply
    55,138.70x = 82,708.05 × 40,277.90
  4. Step 4: Simplify right side
    55,138.70x = 3,331,306,567.10
  5. Step 5: Solve for x
    x = 3,331,306,567.10/55,138.70
  6. Step 6: Final answer
    x = 60,416.85

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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.