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Finding the Fourth Proportional to 81,009.33, 121,513.97 and 21,844.98

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Solution

The fourth proportional to 81,009.33, 121,513.97 and 21,844.98 is: 32,767.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,009.33 : 121,513.97 = 21,844.98 : x
  2. Step 2: Convert to fraction form
    81,009.33/121,513.97 = 21,844.98/x
  3. Step 3: Cross multiply
    81,009.33x = 121,513.97 × 21,844.98
  4. Step 4: Simplify right side
    81,009.33x = 2,654,470,128.10
  5. Step 5: Solve for x
    x = 2,654,470,128.10/81,009.33
  6. Step 6: Final answer
    x = 32,767.46

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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.