Home / 131,489.28-181,488.96-81,159.36

Finding the Fourth Proportional to 131,489.28, 181,488.96 and 81,159.36

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Solution

The fourth proportional to 131,489.28, 181,488.96 and 81,159.36 is: 112,020.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,489.28 : 181,488.96 = 81,159.36 : x
  2. Step 2: Convert to fraction form
    131,489.28/181,488.96 = 81,159.36/x
  3. Step 3: Cross multiply
    131,489.28x = 181,488.96 × 81,159.36
  4. Step 4: Simplify right side
    131,489.28x = 14,729,527,840.67
  5. Step 5: Solve for x
    x = 14,729,527,840.67/131,489.28
  6. Step 6: Final answer
    x = 112,020.75

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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.