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Finding the Fourth Proportional to 128,510.55, 192,765.78 and 35,016.30

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Solution

The fourth proportional to 128,510.55, 192,765.78 and 35,016.30 is: 52,524.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,510.55 : 192,765.78 = 35,016.30 : x
  2. Step 2: Convert to fraction form
    128,510.55/192,765.78 = 35,016.30/x
  3. Step 3: Cross multiply
    128,510.55x = 192,765.78 × 35,016.30
  4. Step 4: Simplify right side
    128,510.55x = 6,749,944,382.21
  5. Step 5: Solve for x
    x = 6,749,944,382.21/128,510.55
  6. Step 6: Final answer
    x = 52,524.44

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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.