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Finding the Fourth Proportional to 87,636.56, 131,427 and 28,458.56

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Solution

The fourth proportional to 87,636.56, 131,427 and 28,458.56 is: 42,678.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,636.56 : 131,427 = 28,458.56 : x
  2. Step 2: Convert to fraction form
    87,636.56/131,427 = 28,458.56/x
  3. Step 3: Cross multiply
    87,636.56x = 131,427 × 28,458.56
  4. Step 4: Simplify right side
    87,636.56x = 3,740,223,165.12
  5. Step 5: Solve for x
    x = 3,740,223,165.12/87,636.56
  6. Step 6: Final answer
    x = 42,678.80

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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.