Home / 129,966.44-179,278.87-78,247.59

Finding the Fourth Proportional to 129,966.44, 179,278.87 and 78,247.59

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Solution

The fourth proportional to 129,966.44, 179,278.87 and 78,247.59 is: 107,936.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,966.44 : 179,278.87 = 78,247.59 : x
  2. Step 2: Convert to fraction form
    129,966.44/179,278.87 = 78,247.59/x
  3. Step 3: Cross multiply
    129,966.44x = 179,278.87 × 78,247.59
  4. Step 4: Simplify right side
    129,966.44x = 14,028,139,319.80
  5. Step 5: Solve for x
    x = 14,028,139,319.80/129,966.44
  6. Step 6: Final answer
    x = 107,936.63

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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.