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Finding the Fourth Proportional to 121,036, 167,029.68 and 68,044

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Solution

The fourth proportional to 121,036, 167,029.68 and 68,044 is: 93,900.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,036 : 167,029.68 = 68,044 : x
  2. Step 2: Convert to fraction form
    121,036/167,029.68 = 68,044/x
  3. Step 3: Cross multiply
    121,036x = 167,029.68 × 68,044
  4. Step 4: Simplify right side
    121,036x = 11,365,367,545.92
  5. Step 5: Solve for x
    x = 11,365,367,545.92/121,036
  6. Step 6: Final answer
    x = 93,900.72

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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.