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Finding the Fourth Proportional to 128,658.16, 192,964.56 and 49,707.46

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Solution

The fourth proportional to 128,658.16, 192,964.56 and 49,707.46 is: 74,552.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,658.16 : 192,964.56 = 49,707.46 : x
  2. Step 2: Convert to fraction form
    128,658.16/192,964.56 = 49,707.46/x
  3. Step 3: Cross multiply
    128,658.16x = 192,964.56 × 49,707.46
  4. Step 4: Simplify right side
    128,658.16x = 9,591,778,147.62
  5. Step 5: Solve for x
    x = 9,591,778,147.62/128,658.16
  6. Step 6: Final answer
    x = 74,552.43

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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.