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Finding the Fourth Proportional to 87,439.56, 120,639.24 and 51,642.24

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Solution

The fourth proportional to 87,439.56, 120,639.24 and 51,642.24 is: 71,250.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,439.56 : 120,639.24 = 51,642.24 : x
  2. Step 2: Convert to fraction form
    87,439.56/120,639.24 = 51,642.24/x
  3. Step 3: Cross multiply
    87,439.56x = 120,639.24 × 51,642.24
  4. Step 4: Simplify right side
    87,439.56x = 6,230,080,585.50
  5. Step 5: Solve for x
    x = 6,230,080,585.50/87,439.56
  6. Step 6: Final answer
    x = 71,250.14

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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.