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Finding the Fourth Proportional to 121,982.75, 168,343.61 and 68,266.65

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Solution

The fourth proportional to 121,982.75, 168,343.61 and 68,266.65 is: 94,212.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,982.75 : 168,343.61 = 68,266.65 : x
  2. Step 2: Convert to fraction form
    121,982.75/168,343.61 = 68,266.65/x
  3. Step 3: Cross multiply
    121,982.75x = 168,343.61 × 68,266.65
  4. Step 4: Simplify right side
    121,982.75x = 11,492,254,303.61
  5. Step 5: Solve for x
    x = 11,492,254,303.61/121,982.75
  6. Step 6: Final answer
    x = 94,212.13

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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.