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Finding the Fourth Proportional to 205,894.20, 308,841.30 and 72,773.40

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Solution

The fourth proportional to 205,894.20, 308,841.30 and 72,773.40 is: 109,160.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,894.20 : 308,841.30 = 72,773.40 : x
  2. Step 2: Convert to fraction form
    205,894.20/308,841.30 = 72,773.40/x
  3. Step 3: Cross multiply
    205,894.20x = 308,841.30 × 72,773.40
  4. Step 4: Simplify right side
    205,894.20x = 22,475,431,461.42
  5. Step 5: Solve for x
    x = 22,475,431,461.42/205,894.20
  6. Step 6: Final answer
    x = 109,160.10

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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.