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Finding the Fourth Proportional to 128,472.74, 192,708.04 and 100,416.37

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Solution

The fourth proportional to 128,472.74, 192,708.04 and 100,416.37 is: 150,623.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,472.74 : 192,708.04 = 100,416.37 : x
  2. Step 2: Convert to fraction form
    128,472.74/192,708.04 = 100,416.37/x
  3. Step 3: Cross multiply
    128,472.74x = 192,708.04 × 100,416.37
  4. Step 4: Simplify right side
    128,472.74x = 19,351,041,846.61
  5. Step 5: Solve for x
    x = 19,351,041,846.61/128,472.74
  6. Step 6: Final answer
    x = 150,623.72

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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.