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Finding the Fourth Proportional to 81,641.28, 122,424.90 and 29,052.12

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Solution

The fourth proportional to 81,641.28, 122,424.90 and 29,052.12 is: 43,565.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,641.28 : 122,424.90 = 29,052.12 : x
  2. Step 2: Convert to fraction form
    81,641.28/122,424.90 = 29,052.12/x
  3. Step 3: Cross multiply
    81,641.28x = 122,424.90 × 29,052.12
  4. Step 4: Simplify right side
    81,641.28x = 3,556,702,885.79
  5. Step 5: Solve for x
    x = 3,556,702,885.79/81,641.28
  6. Step 6: Final answer
    x = 43,565.01

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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.