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Finding the Fourth Proportional to 128,713.20, 192,916.20 and 53,833.20

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Solution

The fourth proportional to 128,713.20, 192,916.20 and 53,833.20 is: 80,685.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,713.20 : 192,916.20 = 53,833.20 : x
  2. Step 2: Convert to fraction form
    128,713.20/192,916.20 = 53,833.20/x
  3. Step 3: Cross multiply
    128,713.20x = 192,916.20 × 53,833.20
  4. Step 4: Simplify right side
    128,713.20x = 10,385,296,377.84
  5. Step 5: Solve for x
    x = 10,385,296,377.84/128,713.20
  6. Step 6: Final answer
    x = 80,685.56

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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.