Home / 81,001.85-121,502.78-69,726.65

Finding the Fourth Proportional to 81,001.85, 121,502.78 and 69,726.65

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Solution

The fourth proportional to 81,001.85, 121,502.78 and 69,726.65 is: 104,589.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,001.85 : 121,502.78 = 69,726.65 : x
  2. Step 2: Convert to fraction form
    81,001.85/121,502.78 = 69,726.65/x
  3. Step 3: Cross multiply
    81,001.85x = 121,502.78 × 69,726.65
  4. Step 4: Simplify right side
    81,001.85x = 8,471,981,466.45
  5. Step 5: Solve for x
    x = 8,471,981,466.45/81,001.85
  6. Step 6: Final answer
    x = 104,589.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.