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Finding the Fourth Proportional to 121,726.89, 167,979.99 and 68,012.34

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Solution

The fourth proportional to 121,726.89, 167,979.99 and 68,012.34 is: 93,855.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,726.89 : 167,979.99 = 68,012.34 : x
  2. Step 2: Convert to fraction form
    121,726.89/167,979.99 = 68,012.34/x
  3. Step 3: Cross multiply
    121,726.89x = 167,979.99 × 68,012.34
  4. Step 4: Simplify right side
    121,726.89x = 11,424,712,193.08
  5. Step 5: Solve for x
    x = 11,424,712,193.08/121,726.89
  6. Step 6: Final answer
    x = 93,855.29

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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.