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Finding the Fourth Proportional to 121,748.55, 168,009.78 and 68,034.01

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Solution

The fourth proportional to 121,748.55, 168,009.78 and 68,034.01 is: 93,885.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,748.55 : 168,009.78 = 68,034.01 : x
  2. Step 2: Convert to fraction form
    121,748.55/168,009.78 = 68,034.01/x
  3. Step 3: Cross multiply
    121,748.55x = 168,009.78 × 68,034.01
  4. Step 4: Simplify right side
    121,748.55x = 11,430,377,872.40
  5. Step 5: Solve for x
    x = 11,430,377,872.40/121,748.55
  6. Step 6: Final answer
    x = 93,885.13

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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.