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Finding the Fourth Proportional to 81,785.70, 112,856.49 and 47,802.15

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Solution

The fourth proportional to 81,785.70, 112,856.49 and 47,802.15 is: 65,962.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,785.70 : 112,856.49 = 47,802.15 : x
  2. Step 2: Convert to fraction form
    81,785.70/112,856.49 = 47,802.15/x
  3. Step 3: Cross multiply
    81,785.70x = 112,856.49 × 47,802.15
  4. Step 4: Simplify right side
    81,785.70x = 5,394,782,863.45
  5. Step 5: Solve for x
    x = 5,394,782,863.45/81,785.70
  6. Step 6: Final answer
    x = 65,962.42

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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.