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Finding the Fourth Proportional to 128,155.72, 192,232.88 and 52,253.96

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Solution

The fourth proportional to 128,155.72, 192,232.88 and 52,253.96 is: 78,380.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,155.72 : 192,232.88 = 52,253.96 : x
  2. Step 2: Convert to fraction form
    128,155.72/192,232.88 = 52,253.96/x
  3. Step 3: Cross multiply
    128,155.72x = 192,232.88 × 52,253.96
  4. Step 4: Simplify right side
    128,155.72x = 10,044,929,222.20
  5. Step 5: Solve for x
    x = 10,044,929,222.20/128,155.72
  6. Step 6: Final answer
    x = 78,380.65

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1.5x scale

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.