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Finding the Fourth Proportional to 81,730.48, 122,595.54 and 21,758.97

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Solution

The fourth proportional to 81,730.48, 122,595.54 and 21,758.97 is: 32,638.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,730.48 : 122,595.54 = 21,758.97 : x
  2. Step 2: Convert to fraction form
    81,730.48/122,595.54 = 21,758.97/x
  3. Step 3: Cross multiply
    81,730.48x = 122,595.54 × 21,758.97
  4. Step 4: Simplify right side
    81,730.48x = 2,667,552,676.99
  5. Step 5: Solve for x
    x = 2,667,552,676.99/81,730.48
  6. Step 6: Final answer
    x = 32,638.41

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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.