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Finding the Fourth Proportional to 258,237.60, 387,378.72 and 71,249.10

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Solution

The fourth proportional to 258,237.60, 387,378.72 and 71,249.10 is: 106,879.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,237.60 : 387,378.72 = 71,249.10 : x
  2. Step 2: Convert to fraction form
    258,237.60/387,378.72 = 71,249.10/x
  3. Step 3: Cross multiply
    258,237.60x = 387,378.72 × 71,249.10
  4. Step 4: Simplify right side
    258,237.60x = 27,600,385,159.15
  5. Step 5: Solve for x
    x = 27,600,385,159.15/258,237.60
  6. Step 6: Final answer
    x = 106,879.81

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1.5x scale

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.