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Finding the Fourth Proportional to 118,737.77, 178,112.12 and 66,107.61

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Solution

The fourth proportional to 118,737.77, 178,112.12 and 66,107.61 is: 99,164.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,737.77 : 178,112.12 = 66,107.61 : x
  2. Step 2: Convert to fraction form
    118,737.77/178,112.12 = 66,107.61/x
  3. Step 3: Cross multiply
    118,737.77x = 178,112.12 × 66,107.61
  4. Step 4: Simplify right side
    118,737.77x = 11,774,566,234.70
  5. Step 5: Solve for x
    x = 11,774,566,234.70/118,737.77
  6. Step 6: Final answer
    x = 99,164.46

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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.