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Finding the Fourth Proportional to 242,639.70, 363,946.31 and 74,159.97

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Solution

The fourth proportional to 242,639.70, 363,946.31 and 74,159.97 is: 111,235.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,639.70 : 363,946.31 = 74,159.97 : x
  2. Step 2: Convert to fraction form
    242,639.70/363,946.31 = 74,159.97/x
  3. Step 3: Cross multiply
    242,639.70x = 363,946.31 × 74,159.97
  4. Step 4: Simplify right side
    242,639.70x = 26,990,247,060.41
  5. Step 5: Solve for x
    x = 26,990,247,060.41/242,639.70
  6. Step 6: Final answer
    x = 111,235.91

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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.