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Finding the Fourth Proportional to 83,687.45, 115,489.58 and 45,961.70

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Solution

The fourth proportional to 83,687.45, 115,489.58 and 45,961.70 is: 63,427.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,687.45 : 115,489.58 = 45,961.70 : x
  2. Step 2: Convert to fraction form
    83,687.45/115,489.58 = 45,961.70/x
  3. Step 3: Cross multiply
    83,687.45x = 115,489.58 × 45,961.70
  4. Step 4: Simplify right side
    83,687.45x = 5,308,096,621.83
  5. Step 5: Solve for x
    x = 5,308,096,621.83/83,687.45
  6. Step 6: Final answer
    x = 63,427.63

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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.