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Finding the Fourth Proportional to 87,396.90, 130,998.15 and 47,982.30

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Solution

The fourth proportional to 87,396.90, 130,998.15 and 47,982.30 is: 71,920.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,396.90 : 130,998.15 = 47,982.30 : x
  2. Step 2: Convert to fraction form
    87,396.90/130,998.15 = 47,982.30/x
  3. Step 3: Cross multiply
    87,396.90x = 130,998.15 × 47,982.30
  4. Step 4: Simplify right side
    87,396.90x = 6,285,592,532.75
  5. Step 5: Solve for x
    x = 6,285,592,532.75/87,396.90
  6. Step 6: Final answer
    x = 71,920.09

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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.