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Finding the Fourth Proportional to 121,730.70, 167,985.14 and 68,016.16

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Solution

The fourth proportional to 121,730.70, 167,985.14 and 68,016.16 is: 93,860.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,730.70 : 167,985.14 = 68,016.16 : x
  2. Step 2: Convert to fraction form
    121,730.70/167,985.14 = 68,016.16/x
  3. Step 3: Cross multiply
    121,730.70x = 167,985.14 × 68,016.16
  4. Step 4: Simplify right side
    121,730.70x = 11,425,703,467.44
  5. Step 5: Solve for x
    x = 11,425,703,467.44/121,730.70
  6. Step 6: Final answer
    x = 93,860.49

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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.