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Finding the Fourth Proportional to 54,389.44, 81,584.16 and 19,330.48

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Solution

The fourth proportional to 54,389.44, 81,584.16 and 19,330.48 is: 28,995.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,389.44 : 81,584.16 = 19,330.48 : x
  2. Step 2: Convert to fraction form
    54,389.44/81,584.16 = 19,330.48/x
  3. Step 3: Cross multiply
    54,389.44x = 81,584.16 × 19,330.48
  4. Step 4: Simplify right side
    54,389.44x = 1,577,060,973.20
  5. Step 5: Solve for x
    x = 1,577,060,973.20/54,389.44
  6. Step 6: Final answer
    x = 28,995.72

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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.