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Finding the Fourth Proportional to 122,372.25, 168,874.11 and 71,420.01

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Solution

The fourth proportional to 122,372.25, 168,874.11 and 71,420.01 is: 98,559.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,372.25 : 168,874.11 = 71,420.01 : x
  2. Step 2: Convert to fraction form
    122,372.25/168,874.11 = 71,420.01/x
  3. Step 3: Cross multiply
    122,372.25x = 168,874.11 × 71,420.01
  4. Step 4: Simplify right side
    122,372.25x = 12,060,990,624.94
  5. Step 5: Solve for x
    x = 12,060,990,624.94/122,372.25
  6. Step 6: Final answer
    x = 98,559.85

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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.