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Finding the Fourth Proportional to 216,475.60, 324,713.40 and 66,702.55

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Solution

The fourth proportional to 216,475.60, 324,713.40 and 66,702.55 is: 100,053.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,475.60 : 324,713.40 = 66,702.55 : x
  2. Step 2: Convert to fraction form
    216,475.60/324,713.40 = 66,702.55/x
  3. Step 3: Cross multiply
    216,475.60x = 324,713.40 × 66,702.55
  4. Step 4: Simplify right side
    216,475.60x = 21,659,211,799.17
  5. Step 5: Solve for x
    x = 21,659,211,799.17/216,475.60
  6. Step 6: Final answer
    x = 100,053.83

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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.