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Finding the Fourth Proportional to 67,340.80, 101,011.20 and 43,721.20

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Solution

The fourth proportional to 67,340.80, 101,011.20 and 43,721.20 is: 65,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,340.80 : 101,011.20 = 43,721.20 : x
  2. Step 2: Convert to fraction form
    67,340.80/101,011.20 = 43,721.20/x
  3. Step 3: Cross multiply
    67,340.80x = 101,011.20 × 43,721.20
  4. Step 4: Simplify right side
    67,340.80x = 4,416,330,877.44
  5. Step 5: Solve for x
    x = 4,416,330,877.44/67,340.80
  6. Step 6: Final answer
    x = 65,581.80

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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.