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Finding the Fourth Proportional to 258,244.98, 387,389.79 and 71,256.48

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Solution

The fourth proportional to 258,244.98, 387,389.79 and 71,256.48 is: 106,890.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,244.98 : 387,389.79 = 71,256.48 : x
  2. Step 2: Convert to fraction form
    258,244.98/387,389.79 = 71,256.48/x
  3. Step 3: Cross multiply
    258,244.98x = 387,389.79 × 71,256.48
  4. Step 4: Simplify right side
    258,244.98x = 27,604,032,823.34
  5. Step 5: Solve for x
    x = 27,604,032,823.34/258,244.98
  6. Step 6: Final answer
    x = 106,890.88

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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.