Home / 87,681.60-131,522.40-28,519.20

Finding the Fourth Proportional to 87,681.60, 131,522.40 and 28,519.20

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Solution

The fourth proportional to 87,681.60, 131,522.40 and 28,519.20 is: 42,778.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,681.60 : 131,522.40 = 28,519.20 : x
  2. Step 2: Convert to fraction form
    87,681.60/131,522.40 = 28,519.20/x
  3. Step 3: Cross multiply
    87,681.60x = 131,522.40 × 28,519.20
  4. Step 4: Simplify right side
    87,681.60x = 3,750,913,630.08
  5. Step 5: Solve for x
    x = 3,750,913,630.08/87,681.60
  6. Step 6: Final answer
    x = 42,778.80

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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.