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Finding the Fourth Proportional to 60,680.40, 91,023.30 and 20,698.80

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Solution

The fourth proportional to 60,680.40, 91,023.30 and 20,698.80 is: 31,049.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,680.40 : 91,023.30 = 20,698.80 : x
  2. Step 2: Convert to fraction form
    60,680.40/91,023.30 = 20,698.80/x
  3. Step 3: Cross multiply
    60,680.40x = 91,023.30 × 20,698.80
  4. Step 4: Simplify right side
    60,680.40x = 1,884,073,082.04
  5. Step 5: Solve for x
    x = 1,884,073,082.04/60,680.40
  6. Step 6: Final answer
    x = 31,049.12

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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.