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Finding the Fourth Proportional to 128,310.51, 192,473.64 and 49,424.97

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Solution

The fourth proportional to 128,310.51, 192,473.64 and 49,424.97 is: 74,140.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,310.51 : 192,473.64 = 49,424.97 : x
  2. Step 2: Convert to fraction form
    128,310.51/192,473.64 = 49,424.97/x
  3. Step 3: Cross multiply
    128,310.51x = 192,473.64 × 49,424.97
  4. Step 4: Simplify right side
    128,310.51x = 9,513,003,882.79
  5. Step 5: Solve for x
    x = 9,513,003,882.79/128,310.51
  6. Step 6: Final answer
    x = 74,140.49

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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.