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Finding the Fourth Proportional to 128,708.29, 193,062.59 and 53,787.44

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Solution

The fourth proportional to 128,708.29, 193,062.59 and 53,787.44 is: 80,681.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,708.29 : 193,062.59 = 53,787.44 : x
  2. Step 2: Convert to fraction form
    128,708.29/193,062.59 = 53,787.44/x
  3. Step 3: Cross multiply
    128,708.29x = 193,062.59 × 53,787.44
  4. Step 4: Simplify right side
    128,708.29x = 10,384,342,891.29
  5. Step 5: Solve for x
    x = 10,384,342,891.29/128,708.29
  6. Step 6: Final answer
    x = 80,681.23

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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.