Home / 90,249.08-135,284.32-42,780.80

Finding the Fourth Proportional to 90,249.08, 135,284.32 and 42,780.80

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Solution

The fourth proportional to 90,249.08, 135,284.32 and 42,780.80 is: 64,128.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,249.08 : 135,284.32 = 42,780.80 : x
  2. Step 2: Convert to fraction form
    90,249.08/135,284.32 = 42,780.80/x
  3. Step 3: Cross multiply
    90,249.08x = 135,284.32 × 42,780.80
  4. Step 4: Simplify right side
    90,249.08x = 5,787,571,437.06
  5. Step 5: Solve for x
    x = 5,787,571,437.06/90,249.08
  6. Step 6: Final answer
    x = 64,128.87

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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.