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Finding the Fourth Proportional to 81,658.92, 112,660.86 and 51,446.94

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Solution

The fourth proportional to 81,658.92, 112,660.86 and 51,446.94 is: 70,978.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,658.92 : 112,660.86 = 51,446.94 : x
  2. Step 2: Convert to fraction form
    81,658.92/112,660.86 = 51,446.94/x
  3. Step 3: Cross multiply
    81,658.92x = 112,660.86 × 51,446.94
  4. Step 4: Simplify right side
    81,658.92x = 5,796,056,504.77
  5. Step 5: Solve for x
    x = 5,796,056,504.77/81,658.92
  6. Step 6: Final answer
    x = 70,978.85

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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.