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Finding the Fourth Proportional to 121,102.61, 167,102.34 and 67,387.46

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Solution

The fourth proportional to 121,102.61, 167,102.34 and 67,387.46 is: 92,983.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,102.61 : 167,102.34 = 67,387.46 : x
  2. Step 2: Convert to fraction form
    121,102.61/167,102.34 = 67,387.46/x
  3. Step 3: Cross multiply
    121,102.61x = 167,102.34 × 67,387.46
  4. Step 4: Simplify right side
    121,102.61x = 11,260,602,252.66
  5. Step 5: Solve for x
    x = 11,260,602,252.66/121,102.61
  6. Step 6: Final answer
    x = 92,983.98

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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.