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Finding the Fourth Proportional to 81,808.70, 112,904.54 and 49,998.79

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Solution

The fourth proportional to 81,808.70, 112,904.54 and 49,998.79 is: 69,003.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,808.70 : 112,904.54 = 49,998.79 : x
  2. Step 2: Convert to fraction form
    81,808.70/112,904.54 = 49,998.79/x
  3. Step 3: Cross multiply
    81,808.70x = 112,904.54 × 49,998.79
  4. Step 4: Simplify right side
    81,808.70x = 5,645,090,228.24
  5. Step 5: Solve for x
    x = 5,645,090,228.24/81,808.70
  6. Step 6: Final answer
    x = 69,003.54

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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.