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Finding the Fourth Proportional to 54,421, 81,599.77 and 21,102.15

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Solution

The fourth proportional to 54,421, 81,599.77 and 21,102.15 is: 31,640.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,421 : 81,599.77 = 21,102.15 : x
  2. Step 2: Convert to fraction form
    54,421/81,599.77 = 21,102.15/x
  3. Step 3: Cross multiply
    54,421x = 81,599.77 × 21,102.15
  4. Step 4: Simplify right side
    54,421x = 1,721,930,586.51
  5. Step 5: Solve for x
    x = 1,721,930,586.51/54,421
  6. Step 6: Final answer
    x = 31,640.92

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