Home / 83,620.68-115,389-49,623.36

Finding the Fourth Proportional to 83,620.68, 115,389 and 49,623.36

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Solution

The fourth proportional to 83,620.68, 115,389 and 49,623.36 is: 68,475.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,620.68 : 115,389 = 49,623.36 : x
  2. Step 2: Convert to fraction form
    83,620.68/115,389 = 49,623.36/x
  3. Step 3: Cross multiply
    83,620.68x = 115,389 × 49,623.36
  4. Step 4: Simplify right side
    83,620.68x = 5,725,989,887.04
  5. Step 5: Solve for x
    x = 5,725,989,887.04/83,620.68
  6. Step 6: Final answer
    x = 68,475.76

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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.