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Finding the Fourth Proportional to 122,376.53, 168,890.30 and 71,405.68

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Solution

The fourth proportional to 122,376.53, 168,890.30 and 71,405.68 is: 98,546.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,376.53 : 168,890.30 = 71,405.68 : x
  2. Step 2: Convert to fraction form
    122,376.53/168,890.30 = 71,405.68/x
  3. Step 3: Cross multiply
    122,376.53x = 168,890.30 × 71,405.68
  4. Step 4: Simplify right side
    122,376.53x = 12,059,726,716.90
  5. Step 5: Solve for x
    x = 12,059,726,716.90/122,376.53
  6. Step 6: Final answer
    x = 98,546.08

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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.