Home / 99,570.20-137,408.09-57,132.68

Finding the Fourth Proportional to 99,570.20, 137,408.09 and 57,132.68

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Solution

The fourth proportional to 99,570.20, 137,408.09 and 57,132.68 is: 78,843.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,570.20 : 137,408.09 = 57,132.68 : x
  2. Step 2: Convert to fraction form
    99,570.20/137,408.09 = 57,132.68/x
  3. Step 3: Cross multiply
    99,570.20x = 137,408.09 × 57,132.68
  4. Step 4: Simplify right side
    99,570.20x = 7,850,491,462.68
  5. Step 5: Solve for x
    x = 7,850,491,462.68/99,570.20
  6. Step 6: Final answer
    x = 78,843.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.