Home / 121,929.82-168,320.67-91,726.65

Finding the Fourth Proportional to 121,929.82, 168,320.67 and 91,726.65

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Solution

The fourth proportional to 121,929.82, 168,320.67 and 91,726.65 is: 126,626.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,929.82 : 168,320.67 = 91,726.65 : x
  2. Step 2: Convert to fraction form
    121,929.82/168,320.67 = 91,726.65/x
  3. Step 3: Cross multiply
    121,929.82x = 168,320.67 × 91,726.65
  4. Step 4: Simplify right side
    121,929.82x = 15,439,491,184.86
  5. Step 5: Solve for x
    x = 15,439,491,184.86/121,929.82
  6. Step 6: Final answer
    x = 126,626.05

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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.