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Finding the Fourth Proportional to 132,418.56, 198,303.84 and 85,529.28

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Solution

The fourth proportional to 132,418.56, 198,303.84 and 85,529.28 is: 128,084.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,418.56 : 198,303.84 = 85,529.28 : x
  2. Step 2: Convert to fraction form
    132,418.56/198,303.84 = 85,529.28/x
  3. Step 3: Cross multiply
    132,418.56x = 198,303.84 × 85,529.28
  4. Step 4: Simplify right side
    132,418.56x = 16,960,784,656.44
  5. Step 5: Solve for x
    x = 16,960,784,656.44/132,418.56
  6. Step 6: Final answer
    x = 128,084.65

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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.