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Finding the Fourth Proportional to 121,387.36, 167,498.12 and 67,669.80

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Solution

The fourth proportional to 121,387.36, 167,498.12 and 67,669.80 is: 93,375.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,387.36 : 167,498.12 = 67,669.80 : x
  2. Step 2: Convert to fraction form
    121,387.36/167,498.12 = 67,669.80/x
  3. Step 3: Cross multiply
    121,387.36x = 167,498.12 × 67,669.80
  4. Step 4: Simplify right side
    121,387.36x = 11,334,564,280.78
  5. Step 5: Solve for x
    x = 11,334,564,280.78/121,387.36
  6. Step 6: Final answer
    x = 93,375.16

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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.