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Finding the Fourth Proportional to 87,157.20, 130,671.72 and 27,959.28

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Solution

The fourth proportional to 87,157.20, 130,671.72 and 27,959.28 is: 41,918.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,157.20 : 130,671.72 = 27,959.28 : x
  2. Step 2: Convert to fraction form
    87,157.20/130,671.72 = 27,959.28/x
  3. Step 3: Cross multiply
    87,157.20x = 130,671.72 × 27,959.28
  4. Step 4: Simplify right side
    87,157.20x = 3,653,487,207.56
  5. Step 5: Solve for x
    x = 3,653,487,207.56/87,157.20
  6. Step 6: Final answer
    x = 41,918.36

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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.