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Finding the Fourth Proportional to 121,179.60, 181,747.80 and 76,726.80

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Solution

The fourth proportional to 121,179.60, 181,747.80 and 76,726.80 is: 115,076.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,179.60 : 181,747.80 = 76,726.80 : x
  2. Step 2: Convert to fraction form
    121,179.60/181,747.80 = 76,726.80/x
  3. Step 3: Cross multiply
    121,179.60x = 181,747.80 × 76,726.80
  4. Step 4: Simplify right side
    121,179.60x = 13,944,927,101.04
  5. Step 5: Solve for x
    x = 13,944,927,101.04/121,179.60
  6. Step 6: Final answer
    x = 115,076.52

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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.