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Finding the Fourth Proportional to 81,785.57, 112,863.44 and 45,487.34

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Solution

The fourth proportional to 81,785.57, 112,863.44 and 45,487.34 is: 62,772.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,785.57 : 112,863.44 = 45,487.34 : x
  2. Step 2: Convert to fraction form
    81,785.57/112,863.44 = 45,487.34/x
  3. Step 3: Cross multiply
    81,785.57x = 112,863.44 × 45,487.34
  4. Step 4: Simplify right side
    81,785.57x = 5,133,857,641.49
  5. Step 5: Solve for x
    x = 5,133,857,641.49/81,785.57
  6. Step 6: Final answer
    x = 62,772.17

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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.