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Finding the Fourth Proportional to 136,021.44, 203,721.12 and 86,099.52

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Solution

The fourth proportional to 136,021.44, 203,721.12 and 86,099.52 is: 128,952.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,021.44 : 203,721.12 = 86,099.52 : x
  2. Step 2: Convert to fraction form
    136,021.44/203,721.12 = 86,099.52/x
  3. Step 3: Cross multiply
    136,021.44x = 203,721.12 × 86,099.52
  4. Step 4: Simplify right side
    136,021.44x = 17,540,290,645.86
  5. Step 5: Solve for x
    x = 17,540,290,645.86/136,021.44
  6. Step 6: Final answer
    x = 128,952.40

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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.