Home / 78,679.35-108,576.09-42,869.61

Finding the Fourth Proportional to 78,679.35, 108,576.09 and 42,869.61

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Solution

The fourth proportional to 78,679.35, 108,576.09 and 42,869.61 is: 59,159.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,679.35 : 108,576.09 = 42,869.61 : x
  2. Step 2: Convert to fraction form
    78,679.35/108,576.09 = 42,869.61/x
  3. Step 3: Cross multiply
    78,679.35x = 108,576.09 × 42,869.61
  4. Step 4: Simplify right side
    78,679.35x = 4,654,614,633.62
  5. Step 5: Solve for x
    x = 4,654,614,633.62/78,679.35
  6. Step 6: Final answer
    x = 59,159.29

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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.