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Finding the Fourth Proportional to 81,715.93, 112,767.30 and 45,905.17

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Solution

The fourth proportional to 81,715.93, 112,767.30 and 45,905.17 is: 63,348.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,715.93 : 112,767.30 = 45,905.17 : x
  2. Step 2: Convert to fraction form
    81,715.93/112,767.30 = 45,905.17/x
  3. Step 3: Cross multiply
    81,715.93x = 112,767.30 × 45,905.17
  4. Step 4: Simplify right side
    81,715.93x = 5,176,601,912.44
  5. Step 5: Solve for x
    x = 5,176,601,912.44/81,715.93
  6. Step 6: Final answer
    x = 63,348.75

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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.