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Finding the Fourth Proportional to 67,630.80, 101,424.60 and 28,178.40

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Solution

The fourth proportional to 67,630.80, 101,424.60 and 28,178.40 is: 42,258.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,630.80 : 101,424.60 = 28,178.40 : x
  2. Step 2: Convert to fraction form
    67,630.80/101,424.60 = 28,178.40/x
  3. Step 3: Cross multiply
    67,630.80x = 101,424.60 × 28,178.40
  4. Step 4: Simplify right side
    67,630.80x = 2,857,982,948.64
  5. Step 5: Solve for x
    x = 2,857,982,948.64/67,630.80
  6. Step 6: Final answer
    x = 42,258.60

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1.5x scale

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.