Home / 87,128.92-130,705.49-27,982.72

Finding the Fourth Proportional to 87,128.92, 130,705.49 and 27,982.72

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Solution

The fourth proportional to 87,128.92, 130,705.49 and 27,982.72 is: 41,977.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,128.92 : 130,705.49 = 27,982.72 : x
  2. Step 2: Convert to fraction form
    87,128.92/130,705.49 = 27,982.72/x
  3. Step 3: Cross multiply
    87,128.92x = 130,705.49 × 27,982.72
  4. Step 4: Simplify right side
    87,128.92x = 3,657,495,129.13
  5. Step 5: Solve for x
    x = 3,657,495,129.13/87,128.92
  6. Step 6: Final answer
    x = 41,977.97

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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.