Home / 112,121.62-154,738.77-83,778.10

Finding the Fourth Proportional to 112,121.62, 154,738.77 and 83,778.10

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Solution

The fourth proportional to 112,121.62, 154,738.77 and 83,778.10 is: 115,621.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,121.62 : 154,738.77 = 83,778.10 : x
  2. Step 2: Convert to fraction form
    112,121.62/154,738.77 = 83,778.10/x
  3. Step 3: Cross multiply
    112,121.62x = 154,738.77 × 83,778.10
  4. Step 4: Simplify right side
    112,121.62x = 12,963,720,146.94
  5. Step 5: Solve for x
    x = 12,963,720,146.94/112,121.62
  6. Step 6: Final answer
    x = 115,621.95

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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.