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Finding the Fourth Proportional to 118,689.62, 178,034.42 and 39,803.61

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Solution

The fourth proportional to 118,689.62, 178,034.42 and 39,803.61 is: 59,705.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,689.62 : 178,034.42 = 39,803.61 : x
  2. Step 2: Convert to fraction form
    118,689.62/178,034.42 = 39,803.61/x
  3. Step 3: Cross multiply
    118,689.62x = 178,034.42 × 39,803.61
  4. Step 4: Simplify right side
    118,689.62x = 7,086,413,387.39
  5. Step 5: Solve for x
    x = 7,086,413,387.39/118,689.62
  6. Step 6: Final answer
    x = 59,705.42

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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.