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Finding the Fourth Proportional to 67,680.40, 101,520.60 and 30,744.40

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Solution

The fourth proportional to 67,680.40, 101,520.60 and 30,744.40 is: 46,116.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,680.40 : 101,520.60 = 30,744.40 : x
  2. Step 2: Convert to fraction form
    67,680.40/101,520.60 = 30,744.40/x
  3. Step 3: Cross multiply
    67,680.40x = 101,520.60 × 30,744.40
  4. Step 4: Simplify right side
    67,680.40x = 3,121,189,934.64
  5. Step 5: Solve for x
    x = 3,121,189,934.64/67,680.40
  6. Step 6: Final answer
    x = 46,116.60

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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.