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Finding the Fourth Proportional to 121,897.83, 167,868.16 and 100,480.29

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Solution

The fourth proportional to 121,897.83, 167,868.16 and 100,480.29 is: 138,373.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,897.83 : 167,868.16 = 100,480.29 : x
  2. Step 2: Convert to fraction form
    121,897.83/167,868.16 = 100,480.29/x
  3. Step 3: Cross multiply
    121,897.83x = 167,868.16 × 100,480.29
  4. Step 4: Simplify right side
    121,897.83x = 16,867,441,398.57
  5. Step 5: Solve for x
    x = 16,867,441,398.57/121,897.83
  6. Step 6: Final answer
    x = 138,373.60

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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.