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Finding the Fourth Proportional to 128,634.32, 192,945.54 and 35,139.80

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Solution

The fourth proportional to 128,634.32, 192,945.54 and 35,139.80 is: 52,708.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,634.32 : 192,945.54 = 35,139.80 : x
  2. Step 2: Convert to fraction form
    128,634.32/192,945.54 = 35,139.80/x
  3. Step 3: Cross multiply
    128,634.32x = 192,945.54 × 35,139.80
  4. Step 4: Simplify right side
    128,634.32x = 6,780,067,686.49
  5. Step 5: Solve for x
    x = 6,780,067,686.49/128,634.32
  6. Step 6: Final answer
    x = 52,708.08

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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.