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Finding the Fourth Proportional to 121,816.53, 168,108.01 and 68,104.49

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Solution

The fourth proportional to 121,816.53, 168,108.01 and 68,104.49 is: 93,984.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,816.53 : 168,108.01 = 68,104.49 : x
  2. Step 2: Convert to fraction form
    121,816.53/168,108.01 = 68,104.49/x
  3. Step 3: Cross multiply
    121,816.53x = 168,108.01 × 68,104.49
  4. Step 4: Simplify right side
    121,816.53x = 11,448,909,275.16
  5. Step 5: Solve for x
    x = 11,448,909,275.16/121,816.53
  6. Step 6: Final answer
    x = 93,984.86

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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.