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Finding the Fourth Proportional to 155,679.81, 214,763.57 and 149,644.29

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Solution

The fourth proportional to 155,679.81, 214,763.57 and 149,644.29 is: 206,437.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,679.81 : 214,763.57 = 149,644.29 : x
  2. Step 2: Convert to fraction form
    155,679.81/214,763.57 = 149,644.29/x
  3. Step 3: Cross multiply
    155,679.81x = 214,763.57 × 149,644.29
  4. Step 4: Simplify right side
    155,679.81x = 32,138,141,202.29
  5. Step 5: Solve for x
    x = 32,138,141,202.29/155,679.81
  6. Step 6: Final answer
    x = 206,437.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.