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Finding the Fourth Proportional to 67,620.40, 101,344.20 and 49,130.80

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Solution

The fourth proportional to 67,620.40, 101,344.20 and 49,130.80 is: 73,633.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,620.40 : 101,344.20 = 49,130.80 : x
  2. Step 2: Convert to fraction form
    67,620.40/101,344.20 = 49,130.80/x
  3. Step 3: Cross multiply
    67,620.40x = 101,344.20 × 49,130.80
  4. Step 4: Simplify right side
    67,620.40x = 4,979,121,621.36
  5. Step 5: Solve for x
    x = 4,979,121,621.36/67,620.40
  6. Step 6: Final answer
    x = 73,633.42

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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.