Home / 131,716.40-181,757.13-77,991.80

Finding the Fourth Proportional to 131,716.40, 181,757.13 and 77,991.80

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Solution

The fourth proportional to 131,716.40, 181,757.13 and 77,991.80 is: 107,621.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,716.40 : 181,757.13 = 77,991.80 : x
  2. Step 2: Convert to fraction form
    131,716.40/181,757.13 = 77,991.80/x
  3. Step 3: Cross multiply
    131,716.40x = 181,757.13 × 77,991.80
  4. Step 4: Simplify right side
    131,716.40x = 14,175,565,731.53
  5. Step 5: Solve for x
    x = 14,175,565,731.53/131,716.40
  6. Step 6: Final answer
    x = 107,621.87

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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.