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Finding the Fourth Proportional to 84,570.84, 126,846.54 and 28,408.68

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Solution

The fourth proportional to 84,570.84, 126,846.54 and 28,408.68 is: 42,609.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,570.84 : 126,846.54 = 28,408.68 : x
  2. Step 2: Convert to fraction form
    84,570.84/126,846.54 = 28,408.68/x
  3. Step 3: Cross multiply
    84,570.84x = 126,846.54 × 28,408.68
  4. Step 4: Simplify right side
    84,570.84x = 3,603,542,763.97
  5. Step 5: Solve for x
    x = 3,603,542,763.97/84,570.84
  6. Step 6: Final answer
    x = 42,609.75

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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.