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Finding the Fourth Proportional to 258,508.80, 387,762.48 and 81,016.56

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Solution

The fourth proportional to 258,508.80, 387,762.48 and 81,016.56 is: 121,524.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,508.80 : 387,762.48 = 81,016.56 : x
  2. Step 2: Convert to fraction form
    258,508.80/387,762.48 = 81,016.56/x
  3. Step 3: Cross multiply
    258,508.80x = 387,762.48 × 81,016.56
  4. Step 4: Simplify right side
    258,508.80x = 31,415,182,226.67
  5. Step 5: Solve for x
    x = 31,415,182,226.67/258,508.80
  6. Step 6: Final answer
    x = 121,524.61

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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.