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Finding the Fourth Proportional to 268,379.90, 402,569.58 and 68,699.96

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Solution

The fourth proportional to 268,379.90, 402,569.58 and 68,699.96 is: 103,049.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,379.90 : 402,569.58 = 68,699.96 : x
  2. Step 2: Convert to fraction form
    268,379.90/402,569.58 = 68,699.96/x
  3. Step 3: Cross multiply
    268,379.90x = 402,569.58 × 68,699.96
  4. Step 4: Simplify right side
    268,379.90x = 27,656,514,043.22
  5. Step 5: Solve for x
    x = 27,656,514,043.22/268,379.90
  6. Step 6: Final answer
    x = 103,049.87

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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.