Home / 131,719.80-181,808.46-81,390.36

Finding the Fourth Proportional to 131,719.80, 181,808.46 and 81,390.36

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Solution

The fourth proportional to 131,719.80, 181,808.46 and 81,390.36 is: 112,340.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,719.80 : 181,808.46 = 81,390.36 : x
  2. Step 2: Convert to fraction form
    131,719.80/181,808.46 = 81,390.36/x
  3. Step 3: Cross multiply
    131,719.80x = 181,808.46 × 81,390.36
  4. Step 4: Simplify right side
    131,719.80x = 14,797,456,010.45
  5. Step 5: Solve for x
    x = 14,797,456,010.45/131,719.80
  6. Step 6: Final answer
    x = 112,340.41

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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.