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Finding the Fourth Proportional to 118,708.29, 178,076.52 and 74,338.74

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Solution

The fourth proportional to 118,708.29, 178,076.52 and 74,338.74 is: 111,516.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,708.29 : 178,076.52 = 74,338.74 : x
  2. Step 2: Convert to fraction form
    118,708.29/178,076.52 = 74,338.74/x
  3. Step 3: Cross multiply
    118,708.29x = 178,076.52 × 74,338.74
  4. Step 4: Simplify right side
    118,708.29x = 13,237,984,120.38
  5. Step 5: Solve for x
    x = 13,237,984,120.38/118,708.29
  6. Step 6: Final answer
    x = 111,516.93

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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.