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Finding the Fourth Proportional to 87,239.40, 130,859.10 and 80,824.20

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Solution

The fourth proportional to 87,239.40, 130,859.10 and 80,824.20 is: 121,236.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,239.40 : 130,859.10 = 80,824.20 : x
  2. Step 2: Convert to fraction form
    87,239.40/130,859.10 = 80,824.20/x
  3. Step 3: Cross multiply
    87,239.40x = 130,859.10 × 80,824.20
  4. Step 4: Simplify right side
    87,239.40x = 10,576,582,070.22
  5. Step 5: Solve for x
    x = 10,576,582,070.22/87,239.40
  6. Step 6: Final answer
    x = 121,236.30

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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.