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Finding the Fourth Proportional to 54,446.45, 81,681.21 and 19,386

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Solution

The fourth proportional to 54,446.45, 81,681.21 and 19,386 is: 29,083.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,446.45 : 81,681.21 = 19,386 : x
  2. Step 2: Convert to fraction form
    54,446.45/81,681.21 = 19,386/x
  3. Step 3: Cross multiply
    54,446.45x = 81,681.21 × 19,386
  4. Step 4: Simplify right side
    54,446.45x = 1,583,471,937.06
  5. Step 5: Solve for x
    x = 1,583,471,937.06/54,446.45
  6. Step 6: Final answer
    x = 29,083.11

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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.