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Finding the Fourth Proportional to 185,615.40, 278,423.10 and 67,290.60

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Solution

The fourth proportional to 185,615.40, 278,423.10 and 67,290.60 is: 100,935.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,615.40 : 278,423.10 = 67,290.60 : x
  2. Step 2: Convert to fraction form
    185,615.40/278,423.10 = 67,290.60/x
  3. Step 3: Cross multiply
    185,615.40x = 278,423.10 × 67,290.60
  4. Step 4: Simplify right side
    185,615.40x = 18,735,257,452.86
  5. Step 5: Solve for x
    x = 18,735,257,452.86/185,615.40
  6. Step 6: Final answer
    x = 100,935.90

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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.