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Finding the Fourth Proportional to 121,109.50, 167,131.11 and 68,117.50

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Solution

The fourth proportional to 121,109.50, 167,131.11 and 68,117.50 is: 94,002.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,109.50 : 167,131.11 = 68,117.50 : x
  2. Step 2: Convert to fraction form
    121,109.50/167,131.11 = 68,117.50/x
  3. Step 3: Cross multiply
    121,109.50x = 167,131.11 × 68,117.50
  4. Step 4: Simplify right side
    121,109.50x = 11,384,553,385.43
  5. Step 5: Solve for x
    x = 11,384,553,385.43/121,109.50
  6. Step 6: Final answer
    x = 94,002.15

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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.