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Finding the Fourth Proportional to 118,990.83, 178,486.86 and 40,105.74

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Solution

The fourth proportional to 118,990.83, 178,486.86 and 40,105.74 is: 60,158.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,990.83 : 178,486.86 = 40,105.74 : x
  2. Step 2: Convert to fraction form
    118,990.83/178,486.86 = 40,105.74/x
  3. Step 3: Cross multiply
    118,990.83x = 178,486.86 × 40,105.74
  4. Step 4: Simplify right side
    118,990.83x = 7,158,347,600.58
  5. Step 5: Solve for x
    x = 7,158,347,600.58/118,990.83
  6. Step 6: Final answer
    x = 60,158.82

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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.