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Finding the Fourth Proportional to 121,685.16, 167,908.92 and 67,963.32

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Solution

The fourth proportional to 121,685.16, 167,908.92 and 67,963.32 is: 93,780.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,685.16 : 167,908.92 = 67,963.32 : x
  2. Step 2: Convert to fraction form
    121,685.16/167,908.92 = 67,963.32/x
  3. Step 3: Cross multiply
    121,685.16x = 167,908.92 × 67,963.32
  4. Step 4: Simplify right side
    121,685.16x = 11,411,647,660.81
  5. Step 5: Solve for x
    x = 11,411,647,660.81/121,685.16
  6. Step 6: Final answer
    x = 93,780.11

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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.