Home / 129,869.80-179,250.16-76,172.11

Finding the Fourth Proportional to 129,869.80, 179,250.16 and 76,172.11

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Solution

The fourth proportional to 129,869.80, 179,250.16 and 76,172.11 is: 105,135.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,869.80 : 179,250.16 = 76,172.11 : x
  2. Step 2: Convert to fraction form
    129,869.80/179,250.16 = 76,172.11/x
  3. Step 3: Cross multiply
    129,869.80x = 179,250.16 × 76,172.11
  4. Step 4: Simplify right side
    129,869.80x = 13,653,863,067.52
  5. Step 5: Solve for x
    x = 13,653,863,067.52/129,869.80
  6. Step 6: Final answer
    x = 105,135.01

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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.