Home / 129,778.98-179,091.09-72,419.82

Finding the Fourth Proportional to 129,778.98, 179,091.09 and 72,419.82

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Solution

The fourth proportional to 129,778.98, 179,091.09 and 72,419.82 is: 99,937.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,778.98 : 179,091.09 = 72,419.82 : x
  2. Step 2: Convert to fraction form
    129,778.98/179,091.09 = 72,419.82/x
  3. Step 3: Cross multiply
    129,778.98x = 179,091.09 × 72,419.82
  4. Step 4: Simplify right side
    129,778.98x = 12,969,744,501.40
  5. Step 5: Solve for x
    x = 12,969,744,501.40/129,778.98
  6. Step 6: Final answer
    x = 99,937.17

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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.