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Finding the Fourth Proportional to 205,300.80, 308,008.80 and 100,123.20

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Solution

The fourth proportional to 205,300.80, 308,008.80 and 100,123.20 is: 150,212.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,300.80 : 308,008.80 = 100,123.20 : x
  2. Step 2: Convert to fraction form
    205,300.80/308,008.80 = 100,123.20/x
  3. Step 3: Cross multiply
    205,300.80x = 308,008.80 × 100,123.20
  4. Step 4: Simplify right side
    205,300.80x = 30,838,826,684.16
  5. Step 5: Solve for x
    x = 30,838,826,684.16/205,300.80
  6. Step 6: Final answer
    x = 150,212.89

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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.