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Finding the Fourth Proportional to 99,382.60, 148,958.70 and 40,179.40

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Solution

The fourth proportional to 99,382.60, 148,958.70 and 40,179.40 is: 60,222.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,382.60 : 148,958.70 = 40,179.40 : x
  2. Step 2: Convert to fraction form
    99,382.60/148,958.70 = 40,179.40/x
  3. Step 3: Cross multiply
    99,382.60x = 148,958.70 × 40,179.40
  4. Step 4: Simplify right side
    99,382.60x = 5,985,071,190.78
  5. Step 5: Solve for x
    x = 5,985,071,190.78/99,382.60
  6. Step 6: Final answer
    x = 60,222.53

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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.