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Finding the Fourth Proportional to 87,602.80, 131,423.40 and 28,428.40

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Solution

The fourth proportional to 87,602.80, 131,423.40 and 28,428.40 is: 42,648.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,602.80 : 131,423.40 = 28,428.40 : x
  2. Step 2: Convert to fraction form
    87,602.80/131,423.40 = 28,428.40/x
  3. Step 3: Cross multiply
    87,602.80x = 131,423.40 × 28,428.40
  4. Step 4: Simplify right side
    87,602.80x = 3,736,156,984.56
  5. Step 5: Solve for x
    x = 3,736,156,984.56/87,602.80
  6. Step 6: Final answer
    x = 42,648.83

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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.