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Finding the Fourth Proportional to 236,019.10, 353,979.45 and 86,329.90

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Solution

The fourth proportional to 236,019.10, 353,979.45 and 86,329.90 is: 129,476.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,019.10 : 353,979.45 = 86,329.90 : x
  2. Step 2: Convert to fraction form
    236,019.10/353,979.45 = 86,329.90/x
  3. Step 3: Cross multiply
    236,019.10x = 353,979.45 × 86,329.90
  4. Step 4: Simplify right side
    236,019.10x = 30,559,010,520.56
  5. Step 5: Solve for x
    x = 30,559,010,520.56/236,019.10
  6. Step 6: Final answer
    x = 129,476.85

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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.