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Finding the Fourth Proportional to 87,138.92, 130,725.40 and 27,970.04

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Solution

The fourth proportional to 87,138.92, 130,725.40 and 27,970.04 is: 41,960.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,138.92 : 130,725.40 = 27,970.04 : x
  2. Step 2: Convert to fraction form
    87,138.92/130,725.40 = 27,970.04/x
  3. Step 3: Cross multiply
    87,138.92x = 130,725.40 × 27,970.04
  4. Step 4: Simplify right side
    87,138.92x = 3,656,394,667.02
  5. Step 5: Solve for x
    x = 3,656,394,667.02/87,138.92
  6. Step 6: Final answer
    x = 41,960.52

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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.