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Finding the Fourth Proportional to 87,647.80, 131,471.70 and 40,905.40

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Solution

The fourth proportional to 87,647.80, 131,471.70 and 40,905.40 is: 61,358.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,647.80 : 131,471.70 = 40,905.40 : x
  2. Step 2: Convert to fraction form
    87,647.80/131,471.70 = 40,905.40/x
  3. Step 3: Cross multiply
    87,647.80x = 131,471.70 × 40,905.40
  4. Step 4: Simplify right side
    87,647.80x = 5,377,902,477.18
  5. Step 5: Solve for x
    x = 5,377,902,477.18/87,647.80
  6. Step 6: Final answer
    x = 61,358.10

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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.