Home / 129,945.92-179,340.93-78,966.98

Finding the Fourth Proportional to 129,945.92, 179,340.93 and 78,966.98

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Solution

The fourth proportional to 129,945.92, 179,340.93 and 78,966.98 is: 108,983.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,945.92 : 179,340.93 = 78,966.98 : x
  2. Step 2: Convert to fraction form
    129,945.92/179,340.93 = 78,966.98/x
  3. Step 3: Cross multiply
    129,945.92x = 179,340.93 × 78,966.98
  4. Step 4: Simplify right side
    129,945.92x = 14,162,011,632.49
  5. Step 5: Solve for x
    x = 14,162,011,632.49/129,945.92
  6. Step 6: Final answer
    x = 108,983.89

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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.