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Finding the Fourth Proportional to 83,486.80, 115,216.48 and 49,515.40

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Solution

The fourth proportional to 83,486.80, 115,216.48 and 49,515.40 is: 68,334.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,486.80 : 115,216.48 = 49,515.40 : x
  2. Step 2: Convert to fraction form
    83,486.80/115,216.48 = 49,515.40/x
  3. Step 3: Cross multiply
    83,486.80x = 115,216.48 × 49,515.40
  4. Step 4: Simplify right side
    83,486.80x = 5,704,990,093.79
  5. Step 5: Solve for x
    x = 5,704,990,093.79/83,486.80
  6. Step 6: Final answer
    x = 68,334.04

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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.