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Finding the Fourth Proportional to 258,554.68, 387,840.50 and 71,550.52

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Solution

The fourth proportional to 258,554.68, 387,840.50 and 71,550.52 is: 107,328.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,554.68 : 387,840.50 = 71,550.52 : x
  2. Step 2: Convert to fraction form
    258,554.68/387,840.50 = 71,550.52/x
  3. Step 3: Cross multiply
    258,554.68x = 387,840.50 × 71,550.52
  4. Step 4: Simplify right side
    258,554.68x = 27,750,189,452.06
  5. Step 5: Solve for x
    x = 27,750,189,452.06/258,554.68
  6. Step 6: Final answer
    x = 107,328.13

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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.