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Finding the Fourth Proportional to 118,705.30, 178,072.02 and 74,335.73

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Solution

The fourth proportional to 118,705.30, 178,072.02 and 74,335.73 is: 111,512.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,705.30 : 178,072.02 = 74,335.73 : x
  2. Step 2: Convert to fraction form
    118,705.30/178,072.02 = 74,335.73/x
  3. Step 3: Cross multiply
    118,705.30x = 178,072.02 × 74,335.73
  4. Step 4: Simplify right side
    118,705.30x = 13,237,112,708.91
  5. Step 5: Solve for x
    x = 13,237,112,708.91/118,705.30
  6. Step 6: Final answer
    x = 111,512.40

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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.