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Finding the Fourth Proportional to 118,876.80, 178,257.60 and 66,230.40

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Solution

The fourth proportional to 118,876.80, 178,257.60 and 66,230.40 is: 99,313.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,876.80 : 178,257.60 = 66,230.40 : x
  2. Step 2: Convert to fraction form
    118,876.80/178,257.60 = 66,230.40/x
  3. Step 3: Cross multiply
    118,876.80x = 178,257.60 × 66,230.40
  4. Step 4: Simplify right side
    118,876.80x = 11,806,072,151.04
  5. Step 5: Solve for x
    x = 11,806,072,151.04/118,876.80
  6. Step 6: Final answer
    x = 99,313.51

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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.