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Finding the Fourth Proportional to 122,426.55, 168,948.64 and 68,711.57

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Solution

The fourth proportional to 122,426.55, 168,948.64 and 68,711.57 is: 94,821.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,426.55 : 168,948.64 = 68,711.57 : x
  2. Step 2: Convert to fraction form
    122,426.55/168,948.64 = 68,711.57/x
  3. Step 3: Cross multiply
    122,426.55x = 168,948.64 × 68,711.57
  4. Step 4: Simplify right side
    122,426.55x = 11,608,725,115.46
  5. Step 5: Solve for x
    x = 11,608,725,115.46/122,426.55
  6. Step 6: Final answer
    x = 94,821.96

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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.