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Finding the Fourth Proportional to 185,630.40, 278,445.60 and 126,581.40

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Solution

The fourth proportional to 185,630.40, 278,445.60 and 126,581.40 is: 189,872.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,630.40 : 278,445.60 = 126,581.40 : x
  2. Step 2: Convert to fraction form
    185,630.40/278,445.60 = 126,581.40/x
  3. Step 3: Cross multiply
    185,630.40x = 278,445.60 × 126,581.40
  4. Step 4: Simplify right side
    185,630.40x = 35,246,033,871.84
  5. Step 5: Solve for x
    x = 35,246,033,871.84/185,630.40
  6. Step 6: Final answer
    x = 189,872.10

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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.