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Finding the Fourth Proportional to 118,874, 178,190.88 and 74,531.84

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Solution

The fourth proportional to 118,874, 178,190.88 and 74,531.84 is: 111,722.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,874 : 178,190.88 = 74,531.84 : x
  2. Step 2: Convert to fraction form
    118,874/178,190.88 = 74,531.84/x
  3. Step 3: Cross multiply
    118,874x = 178,190.88 × 74,531.84
  4. Step 4: Simplify right side
    118,874x = 13,280,894,157.62
  5. Step 5: Solve for x
    x = 13,280,894,157.62/118,874
  6. Step 6: Final answer
    x = 111,722.45

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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.