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Finding the Fourth Proportional to 87,236.30, 130,854.45 and 80,756.30

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Solution

The fourth proportional to 87,236.30, 130,854.45 and 80,756.30 is: 121,134.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,236.30 : 130,854.45 = 80,756.30 : x
  2. Step 2: Convert to fraction form
    87,236.30/130,854.45 = 80,756.30/x
  3. Step 3: Cross multiply
    87,236.30x = 130,854.45 × 80,756.30
  4. Step 4: Simplify right side
    87,236.30x = 10,567,321,220.54
  5. Step 5: Solve for x
    x = 10,567,321,220.54/87,236.30
  6. Step 6: Final answer
    x = 121,134.45

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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.