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Finding the Fourth Proportional to 259,496.57, 389,060.30 and 99,436.88

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Solution

The fourth proportional to 259,496.57, 389,060.30 and 99,436.88 is: 149,084.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,496.57 : 389,060.30 = 99,436.88 : x
  2. Step 2: Convert to fraction form
    259,496.57/389,060.30 = 99,436.88/x
  3. Step 3: Cross multiply
    259,496.57x = 389,060.30 × 99,436.88
  4. Step 4: Simplify right side
    259,496.57x = 38,686,939,921.38
  5. Step 5: Solve for x
    x = 38,686,939,921.38/259,496.57
  6. Step 6: Final answer
    x = 149,084.59

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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.