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Finding the Fourth Proportional to 205,439.80, 307,641.30 and 163,967.80

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Solution

The fourth proportional to 205,439.80, 307,641.30 and 163,967.80 is: 245,537.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,439.80 : 307,641.30 = 163,967.80 : x
  2. Step 2: Convert to fraction form
    205,439.80/307,641.30 = 163,967.80/x
  3. Step 3: Cross multiply
    205,439.80x = 307,641.30 × 163,967.80
  4. Step 4: Simplify right side
    205,439.80x = 50,443,267,150.14
  5. Step 5: Solve for x
    x = 50,443,267,150.14/205,439.80
  6. Step 6: Final answer
    x = 245,537.95

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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.