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Finding the Fourth Proportional to 87,387.56, 130,799.41 and 45,209.56

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Solution

The fourth proportional to 87,387.56, 130,799.41 and 45,209.56 is: 67,668.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,387.56 : 130,799.41 = 45,209.56 : x
  2. Step 2: Convert to fraction form
    87,387.56/130,799.41 = 45,209.56/x
  3. Step 3: Cross multiply
    87,387.56x = 130,799.41 × 45,209.56
  4. Step 4: Simplify right side
    87,387.56x = 5,913,383,774.36
  5. Step 5: Solve for x
    x = 5,913,383,774.36/87,387.56
  6. Step 6: Final answer
    x = 67,668.48

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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.