Home / 87,691.50-121,014.13-47,405.30

Finding the Fourth Proportional to 87,691.50, 121,014.13 and 47,405.30

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Solution

The fourth proportional to 87,691.50, 121,014.13 and 47,405.30 is: 65,419.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,691.50 : 121,014.13 = 47,405.30 : x
  2. Step 2: Convert to fraction form
    87,691.50/121,014.13 = 47,405.30/x
  3. Step 3: Cross multiply
    87,691.50x = 121,014.13 × 47,405.30
  4. Step 4: Simplify right side
    87,691.50x = 5,736,711,136.89
  5. Step 5: Solve for x
    x = 5,736,711,136.89/87,691.50
  6. Step 6: Final answer
    x = 65,419.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.