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Finding the Fourth Proportional to 121,044.80, 181,661.70 and 83,865.80

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Solution

The fourth proportional to 121,044.80, 181,661.70 and 83,865.80 is: 125,864.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,044.80 : 181,661.70 = 83,865.80 : x
  2. Step 2: Convert to fraction form
    121,044.80/181,661.70 = 83,865.80/x
  3. Step 3: Cross multiply
    121,044.80x = 181,661.70 × 83,865.80
  4. Step 4: Simplify right side
    121,044.80x = 15,235,203,799.86
  5. Step 5: Solve for x
    x = 15,235,203,799.86/121,044.80
  6. Step 6: Final answer
    x = 125,864.17

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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.