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Finding the Fourth Proportional to 259,782.01, 389,663.79 and 99,816.73

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Solution

The fourth proportional to 259,782.01, 389,663.79 and 99,816.73 is: 149,721.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,782.01 : 389,663.79 = 99,816.73 : x
  2. Step 2: Convert to fraction form
    259,782.01/389,663.79 = 99,816.73/x
  3. Step 3: Cross multiply
    259,782.01x = 389,663.79 × 99,816.73
  4. Step 4: Simplify right side
    259,782.01x = 38,894,965,317.21
  5. Step 5: Solve for x
    x = 38,894,965,317.21/259,782.01
  6. Step 6: Final answer
    x = 149,721.55

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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.