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Finding the Fourth Proportional to 258,386.24, 387,579.54 and 71,397.92

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Solution

The fourth proportional to 258,386.24, 387,579.54 and 71,397.92 is: 107,096.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,386.24 : 387,579.54 = 71,397.92 : x
  2. Step 2: Convert to fraction form
    258,386.24/387,579.54 = 71,397.92/x
  3. Step 3: Cross multiply
    258,386.24x = 387,579.54 × 71,397.92
  4. Step 4: Simplify right side
    258,386.24x = 27,672,372,990.56
  5. Step 5: Solve for x
    x = 27,672,372,990.56/258,386.24
  6. Step 6: Final answer
    x = 107,096.93

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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.