Home / 131,981.36-181,932.71-80,899.43

Finding the Fourth Proportional to 131,981.36, 181,932.71 and 80,899.43

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Solution

The fourth proportional to 131,981.36, 181,932.71 and 80,899.43 is: 111,517.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,981.36 : 181,932.71 = 80,899.43 : x
  2. Step 2: Convert to fraction form
    131,981.36/181,932.71 = 80,899.43/x
  3. Step 3: Cross multiply
    131,981.36x = 181,932.71 × 80,899.43
  4. Step 4: Simplify right side
    131,981.36x = 14,718,251,223.19
  5. Step 5: Solve for x
    x = 14,718,251,223.19/131,981.36
  6. Step 6: Final answer
    x = 111,517.66

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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.