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Finding the Fourth Proportional to 138,234.40, 206,953.84 and 123,810.23

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Solution

The fourth proportional to 138,234.40, 206,953.84 and 123,810.23 is: 185,359.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,234.40 : 206,953.84 = 123,810.23 : x
  2. Step 2: Convert to fraction form
    138,234.40/206,953.84 = 123,810.23/x
  3. Step 3: Cross multiply
    138,234.40x = 206,953.84 × 123,810.23
  4. Step 4: Simplify right side
    138,234.40x = 25,623,002,529.78
  5. Step 5: Solve for x
    x = 25,623,002,529.78/138,234.40
  6. Step 6: Final answer
    x = 185,359.09

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1.5x scale

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.