Home / 90,745.20-136,117.80-79,919.55

Finding the Fourth Proportional to 90,745.20, 136,117.80 and 79,919.55

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Solution

The fourth proportional to 90,745.20, 136,117.80 and 79,919.55 is: 119,879.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,745.20 : 136,117.80 = 79,919.55 : x
  2. Step 2: Convert to fraction form
    90,745.20/136,117.80 = 79,919.55/x
  3. Step 3: Cross multiply
    90,745.20x = 136,117.80 × 79,919.55
  4. Step 4: Simplify right side
    90,745.20x = 10,878,473,322.99
  5. Step 5: Solve for x
    x = 10,878,473,322.99/90,745.20
  6. Step 6: Final answer
    x = 119,879.33

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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.