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Finding the Fourth Proportional to 258,491.52, 387,742.14 and 80,994.60

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Solution

The fourth proportional to 258,491.52, 387,742.14 and 80,994.60 is: 121,493.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,491.52 : 387,742.14 = 80,994.60 : x
  2. Step 2: Convert to fraction form
    258,491.52/387,742.14 = 80,994.60/x
  3. Step 3: Cross multiply
    258,491.52x = 387,742.14 × 80,994.60
  4. Step 4: Simplify right side
    258,491.52x = 31,405,019,532.44
  5. Step 5: Solve for x
    x = 31,405,019,532.44/258,491.52
  6. Step 6: Final answer
    x = 121,493.42

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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.