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Finding the Fourth Proportional to 81,808.73, 122,715.84 and 22,639.45

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Solution

The fourth proportional to 81,808.73, 122,715.84 and 22,639.45 is: 33,959.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,808.73 : 122,715.84 = 22,639.45 : x
  2. Step 2: Convert to fraction form
    81,808.73/122,715.84 = 22,639.45/x
  3. Step 3: Cross multiply
    81,808.73x = 122,715.84 × 22,639.45
  4. Step 4: Simplify right side
    81,808.73x = 2,778,219,010.69
  5. Step 5: Solve for x
    x = 2,778,219,010.69/81,808.73
  6. Step 6: Final answer
    x = 33,959.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.