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Finding the Fourth Proportional to 258,079, 387,118.50 and 71,090.52

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Solution

The fourth proportional to 258,079, 387,118.50 and 71,090.52 is: 106,635.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,079 : 387,118.50 = 71,090.52 : x
  2. Step 2: Convert to fraction form
    258,079/387,118.50 = 71,090.52/x
  3. Step 3: Cross multiply
    258,079x = 387,118.50 × 71,090.52
  4. Step 4: Simplify right side
    258,079x = 27,520,455,466.62
  5. Step 5: Solve for x
    x = 27,520,455,466.62/258,079
  6. Step 6: Final answer
    x = 106,635.78

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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.