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Finding the Fourth Proportional to 87,654.80, 131,482.20 and 40,912.40

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Solution

The fourth proportional to 87,654.80, 131,482.20 and 40,912.40 is: 61,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,654.80 : 131,482.20 = 40,912.40 : x
  2. Step 2: Convert to fraction form
    87,654.80/131,482.20 = 40,912.40/x
  3. Step 3: Cross multiply
    87,654.80x = 131,482.20 × 40,912.40
  4. Step 4: Simplify right side
    87,654.80x = 5,379,252,359.28
  5. Step 5: Solve for x
    x = 5,379,252,359.28/87,654.80
  6. Step 6: Final answer
    x = 61,368.60

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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.