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Finding the Fourth Proportional to 121,046.80, 181,664.70 and 83,867.80

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Solution

The fourth proportional to 121,046.80, 181,664.70 and 83,867.80 is: 125,867.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,046.80 : 181,664.70 = 83,867.80 : x
  2. Step 2: Convert to fraction form
    121,046.80/181,664.70 = 83,867.80/x
  3. Step 3: Cross multiply
    121,046.80x = 181,664.70 × 83,867.80
  4. Step 4: Simplify right side
    121,046.80x = 15,235,818,726.66
  5. Step 5: Solve for x
    x = 15,235,818,726.66/121,046.80
  6. Step 6: Final answer
    x = 125,867.17

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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.