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Finding the Fourth Proportional to 145,755.65, 218,433.92 and 74,529.32

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Solution

The fourth proportional to 145,755.65, 218,433.92 and 74,529.32 is: 111,691.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,755.65 : 218,433.92 = 74,529.32 : x
  2. Step 2: Convert to fraction form
    145,755.65/218,433.92 = 74,529.32/x
  3. Step 3: Cross multiply
    145,755.65x = 218,433.92 × 74,529.32
  4. Step 4: Simplify right side
    145,755.65x = 16,279,730,057.72
  5. Step 5: Solve for x
    x = 16,279,730,057.72/145,755.65
  6. Step 6: Final answer
    x = 111,691.93

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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.