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Finding the Fourth Proportional to 128,473.46, 192,700.47 and 39,727.52

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Solution

The fourth proportional to 128,473.46, 192,700.47 and 39,727.52 is: 59,588.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,473.46 : 192,700.47 = 39,727.52 : x
  2. Step 2: Convert to fraction form
    128,473.46/192,700.47 = 39,727.52/x
  3. Step 3: Cross multiply
    128,473.46x = 192,700.47 × 39,727.52
  4. Step 4: Simplify right side
    128,473.46x = 7,655,511,775.93
  5. Step 5: Solve for x
    x = 7,655,511,775.93/128,473.46
  6. Step 6: Final answer
    x = 59,588.27

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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.