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Finding the Fourth Proportional to 128,095.43, 192,139.02 and 57,974.81

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Solution

The fourth proportional to 128,095.43, 192,139.02 and 57,974.81 is: 86,960.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,095.43 : 192,139.02 = 57,974.81 : x
  2. Step 2: Convert to fraction form
    128,095.43/192,139.02 = 57,974.81/x
  3. Step 3: Cross multiply
    128,095.43x = 192,139.02 × 57,974.81
  4. Step 4: Simplify right side
    128,095.43x = 11,139,222,217.39
  5. Step 5: Solve for x
    x = 11,139,222,217.39/128,095.43
  6. Step 6: Final answer
    x = 86,960.34

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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.