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Finding the Fourth Proportional to 84,681.20, 126,964.20 and 40,329.20

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Solution

The fourth proportional to 84,681.20, 126,964.20 and 40,329.20 is: 60,466.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,681.20 : 126,964.20 = 40,329.20 : x
  2. Step 2: Convert to fraction form
    84,681.20/126,964.20 = 40,329.20/x
  3. Step 3: Cross multiply
    84,681.20x = 126,964.20 × 40,329.20
  4. Step 4: Simplify right side
    84,681.20x = 5,120,364,614.64
  5. Step 5: Solve for x
    x = 5,120,364,614.64/84,681.20
  6. Step 6: Final answer
    x = 60,466.37

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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.