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Finding the Fourth Proportional to 87,146.89, 130,720.34 and 60,902.89

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Solution

The fourth proportional to 87,146.89, 130,720.34 and 60,902.89 is: 91,354.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,146.89 : 130,720.34 = 60,902.89 : x
  2. Step 2: Convert to fraction form
    87,146.89/130,720.34 = 60,902.89/x
  3. Step 3: Cross multiply
    87,146.89x = 130,720.34 × 60,902.89
  4. Step 4: Simplify right side
    87,146.89x = 7,961,246,487.78
  5. Step 5: Solve for x
    x = 7,961,246,487.78/87,146.89
  6. Step 6: Final answer
    x = 91,354.34

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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.