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Finding the Fourth Proportional to 128,246.70, 192,379.71 and 38,282.30

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Solution

The fourth proportional to 128,246.70, 192,379.71 and 38,282.30 is: 57,426.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,246.70 : 192,379.71 = 38,282.30 : x
  2. Step 2: Convert to fraction form
    128,246.70/192,379.71 = 38,282.30/x
  3. Step 3: Cross multiply
    128,246.70x = 192,379.71 × 38,282.30
  4. Step 4: Simplify right side
    128,246.70x = 7,364,738,348.79
  5. Step 5: Solve for x
    x = 7,364,738,348.79/128,246.70
  6. Step 6: Final answer
    x = 57,426.34

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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.