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Finding the Fourth Proportional to 128,713.20, 193,012.20 and 49,801.20

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Solution

The fourth proportional to 128,713.20, 193,012.20 and 49,801.20 is: 74,679.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,713.20 : 193,012.20 = 49,801.20 : x
  2. Step 2: Convert to fraction form
    128,713.20/193,012.20 = 49,801.20/x
  3. Step 3: Cross multiply
    128,713.20x = 193,012.20 × 49,801.20
  4. Step 4: Simplify right side
    128,713.20x = 9,612,239,174.64
  5. Step 5: Solve for x
    x = 9,612,239,174.64/128,713.20
  6. Step 6: Final answer
    x = 74,679.51

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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.