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Finding the Fourth Proportional to 268,930.61, 403,301.86 and 79,340.62

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Solution

The fourth proportional to 268,930.61, 403,301.86 and 79,340.62 is: 118,983.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,930.61 : 403,301.86 = 79,340.62 : x
  2. Step 2: Convert to fraction form
    268,930.61/403,301.86 = 79,340.62/x
  3. Step 3: Cross multiply
    268,930.61x = 403,301.86 × 79,340.62
  4. Step 4: Simplify right side
    268,930.61x = 31,998,219,619.55
  5. Step 5: Solve for x
    x = 31,998,219,619.55/268,930.61
  6. Step 6: Final answer
    x = 118,983.18

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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.