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Finding the Fourth Proportional to 259,174.71, 388,803.75 and 90,691.29

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Solution

The fourth proportional to 259,174.71, 388,803.75 and 90,691.29 is: 136,051.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,174.71 : 388,803.75 = 90,691.29 : x
  2. Step 2: Convert to fraction form
    259,174.71/388,803.75 = 90,691.29/x
  3. Step 3: Cross multiply
    259,174.71x = 388,803.75 × 90,691.29
  4. Step 4: Simplify right side
    259,174.71x = 35,261,113,644.34
  5. Step 5: Solve for x
    x = 35,261,113,644.34/259,174.71
  6. Step 6: Final answer
    x = 136,051.52

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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.