Home / 129,799.20-179,166.96-78,840.48

Finding the Fourth Proportional to 129,799.20, 179,166.96 and 78,840.48

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Solution

The fourth proportional to 129,799.20, 179,166.96 and 78,840.48 is: 108,826.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,799.20 : 179,166.96 = 78,840.48 : x
  2. Step 2: Convert to fraction form
    129,799.20/179,166.96 = 78,840.48/x
  3. Step 3: Cross multiply
    129,799.20x = 179,166.96 × 78,840.48
  4. Step 4: Simplify right side
    129,799.20x = 14,125,609,126.54
  5. Step 5: Solve for x
    x = 14,125,609,126.54/129,799.20
  6. Step 6: Final answer
    x = 108,826.63

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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.