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Finding the Fourth Proportional to 128,424.57, 192,375.74 and 104,816.25

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Solution

The fourth proportional to 128,424.57, 192,375.74 and 104,816.25 is: 157,011.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,424.57 : 192,375.74 = 104,816.25 : x
  2. Step 2: Convert to fraction form
    128,424.57/192,375.74 = 104,816.25/x
  3. Step 3: Cross multiply
    128,424.57x = 192,375.74 × 104,816.25
  4. Step 4: Simplify right side
    128,424.57x = 20,164,103,133.69
  5. Step 5: Solve for x
    x = 20,164,103,133.69/128,424.57
  6. Step 6: Final answer
    x = 157,011.26

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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.