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Finding the Fourth Proportional to 84,016.32, 126,024.48 and 69,165.68

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Solution

The fourth proportional to 84,016.32, 126,024.48 and 69,165.68 is: 103,748.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,016.32 : 126,024.48 = 69,165.68 : x
  2. Step 2: Convert to fraction form
    84,016.32/126,024.48 = 69,165.68/x
  3. Step 3: Cross multiply
    84,016.32x = 126,024.48 × 69,165.68
  4. Step 4: Simplify right side
    84,016.32x = 8,716,568,225.72
  5. Step 5: Solve for x
    x = 8,716,568,225.72/84,016.32
  6. Step 6: Final answer
    x = 103,748.51

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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.