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Finding the Fourth Proportional to 84,168.64, 126,132.64 and 61,806.60

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Solution

The fourth proportional to 84,168.64, 126,132.64 and 61,806.60 is: 92,621.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,168.64 : 126,132.64 = 61,806.60 : x
  2. Step 2: Convert to fraction form
    84,168.64/126,132.64 = 61,806.60/x
  3. Step 3: Cross multiply
    84,168.64x = 126,132.64 × 61,806.60
  4. Step 4: Simplify right side
    84,168.64x = 7,795,829,627.42
  5. Step 5: Solve for x
    x = 7,795,829,627.42/84,168.64
  6. Step 6: Final answer
    x = 92,621.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.