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Finding the Fourth Proportional to 132,529.72, 198,673.74 and 85,157.68

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Solution

The fourth proportional to 132,529.72, 198,673.74 and 85,157.68 is: 127,658.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,529.72 : 198,673.74 = 85,157.68 : x
  2. Step 2: Convert to fraction form
    132,529.72/198,673.74 = 85,157.68/x
  3. Step 3: Cross multiply
    132,529.72x = 198,673.74 × 85,157.68
  4. Step 4: Simplify right side
    132,529.72x = 16,918,594,775.32
  5. Step 5: Solve for x
    x = 16,918,594,775.32/132,529.72
  6. Step 6: Final answer
    x = 127,658.87

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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.