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Finding the Fourth Proportional to 122,132.80, 168,558.88 and 71,836.48

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Solution

The fourth proportional to 122,132.80, 168,558.88 and 71,836.48 is: 99,143.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,132.80 : 168,558.88 = 71,836.48 : x
  2. Step 2: Convert to fraction form
    122,132.80/168,558.88 = 71,836.48/x
  3. Step 3: Cross multiply
    122,132.80x = 168,558.88 × 71,836.48
  4. Step 4: Simplify right side
    122,132.80x = 12,108,676,611.94
  5. Step 5: Solve for x
    x = 12,108,676,611.94/122,132.80
  6. Step 6: Final answer
    x = 99,143.53

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1.5x scale

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.