Home / 137,577.80-189,868.56-81,000.20

Finding the Fourth Proportional to 137,577.80, 189,868.56 and 81,000.20

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Solution

The fourth proportional to 137,577.80, 189,868.56 and 81,000.20 is: 111,786.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,577.80 : 189,868.56 = 81,000.20 : x
  2. Step 2: Convert to fraction form
    137,577.80/189,868.56 = 81,000.20/x
  3. Step 3: Cross multiply
    137,577.80x = 189,868.56 × 81,000.20
  4. Step 4: Simplify right side
    137,577.80x = 15,379,391,333.71
  5. Step 5: Solve for x
    x = 15,379,391,333.71/137,577.80
  6. Step 6: Final answer
    x = 111,786.87

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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.