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Finding the Fourth Proportional to 185,630.60, 278,445.90 and 138,974.60

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Solution

The fourth proportional to 185,630.60, 278,445.90 and 138,974.60 is: 208,461.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,630.60 : 278,445.90 = 138,974.60 : x
  2. Step 2: Convert to fraction form
    185,630.60/278,445.90 = 138,974.60/x
  3. Step 3: Cross multiply
    185,630.60x = 278,445.90 × 138,974.60
  4. Step 4: Simplify right side
    185,630.60x = 38,696,907,574.14
  5. Step 5: Solve for x
    x = 38,696,907,574.14/185,630.60
  6. Step 6: Final answer
    x = 208,461.90

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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.