Home / 72,132.20-99,540.39-40,301.09

Finding the Fourth Proportional to 72,132.20, 99,540.39 and 40,301.09

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Solution

The fourth proportional to 72,132.20, 99,540.39 and 40,301.09 is: 55,614.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,132.20 : 99,540.39 = 40,301.09 : x
  2. Step 2: Convert to fraction form
    72,132.20/99,540.39 = 40,301.09/x
  3. Step 3: Cross multiply
    72,132.20x = 99,540.39 × 40,301.09
  4. Step 4: Simplify right side
    72,132.20x = 4,011,586,802.64
  5. Step 5: Solve for x
    x = 4,011,586,802.64/72,132.20
  6. Step 6: Final answer
    x = 55,614.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.