Home / 99,479.12-137,331.90-76,767.08

Finding the Fourth Proportional to 99,479.12, 137,331.90 and 76,767.08

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Solution

The fourth proportional to 99,479.12, 137,331.90 and 76,767.08 is: 105,977.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,479.12 : 137,331.90 = 76,767.08 : x
  2. Step 2: Convert to fraction form
    99,479.12/137,331.90 = 76,767.08/x
  3. Step 3: Cross multiply
    99,479.12x = 137,331.90 × 76,767.08
  4. Step 4: Simplify right side
    99,479.12x = 10,542,568,953.85
  5. Step 5: Solve for x
    x = 10,542,568,953.85/99,479.12
  6. Step 6: Final answer
    x = 105,977.71

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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.