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Finding the Fourth Proportional to 118,948.80, 178,423.20 and 118,129.60

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Solution

The fourth proportional to 118,948.80, 178,423.20 and 118,129.60 is: 177,194.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,948.80 : 178,423.20 = 118,129.60 : x
  2. Step 2: Convert to fraction form
    118,948.80/178,423.20 = 118,129.60/x
  3. Step 3: Cross multiply
    118,948.80x = 178,423.20 × 118,129.60
  4. Step 4: Simplify right side
    118,948.80x = 21,077,061,246.72
  5. Step 5: Solve for x
    x = 21,077,061,246.72/118,948.80
  6. Step 6: Final answer
    x = 177,194.40

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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.