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Finding the Fourth Proportional to 83,635.74, 115,439.45 and 51,786.54

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Solution

The fourth proportional to 83,635.74, 115,439.45 and 51,786.54 is: 71,479.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,635.74 : 115,439.45 = 51,786.54 : x
  2. Step 2: Convert to fraction form
    83,635.74/115,439.45 = 51,786.54/x
  3. Step 3: Cross multiply
    83,635.74x = 115,439.45 × 51,786.54
  4. Step 4: Simplify right side
    83,635.74x = 5,978,209,436.07
  5. Step 5: Solve for x
    x = 5,978,209,436.07/83,635.74
  6. Step 6: Final answer
    x = 71,479.12

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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.