Home / 129,947.92-179,343.69-78,968.98

Finding the Fourth Proportional to 129,947.92, 179,343.69 and 78,968.98

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Solution

The fourth proportional to 129,947.92, 179,343.69 and 78,968.98 is: 108,986.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,947.92 : 179,343.69 = 78,968.98 : x
  2. Step 2: Convert to fraction form
    129,947.92/179,343.69 = 78,968.98/x
  3. Step 3: Cross multiply
    129,947.92x = 179,343.69 × 78,968.98
  4. Step 4: Simplify right side
    129,947.92x = 14,162,588,268.74
  5. Step 5: Solve for x
    x = 14,162,588,268.74/129,947.92
  6. Step 6: Final answer
    x = 108,986.65

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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.