Home / 102,619.68-141,674.08-78,229.20

Finding the Fourth Proportional to 102,619.68, 141,674.08 and 78,229.20

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Solution

The fourth proportional to 102,619.68, 141,674.08 and 78,229.20 is: 108,001.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,619.68 : 141,674.08 = 78,229.20 : x
  2. Step 2: Convert to fraction form
    102,619.68/141,674.08 = 78,229.20/x
  3. Step 3: Cross multiply
    102,619.68x = 141,674.08 × 78,229.20
  4. Step 4: Simplify right side
    102,619.68x = 11,083,049,939.14
  5. Step 5: Solve for x
    x = 11,083,049,939.14/102,619.68
  6. Step 6: Final answer
    x = 108,001.21

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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.