Home / 85,946.20-128,919.30-75,578.20

Finding the Fourth Proportional to 85,946.20, 128,919.30 and 75,578.20

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Solution

The fourth proportional to 85,946.20, 128,919.30 and 75,578.20 is: 113,367.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,946.20 : 128,919.30 = 75,578.20 : x
  2. Step 2: Convert to fraction form
    85,946.20/128,919.30 = 75,578.20/x
  3. Step 3: Cross multiply
    85,946.20x = 128,919.30 × 75,578.20
  4. Step 4: Simplify right side
    85,946.20x = 9,743,488,639.26
  5. Step 5: Solve for x
    x = 9,743,488,639.26/85,946.20
  6. Step 6: Final answer
    x = 113,367.30

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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.