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Finding the Fourth Proportional to 54,987.90, 82,496.36 and 21,699.87

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Solution

The fourth proportional to 54,987.90, 82,496.36 and 21,699.87 is: 32,555.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,987.90 : 82,496.36 = 21,699.87 : x
  2. Step 2: Convert to fraction form
    54,987.90/82,496.36 = 21,699.87/x
  3. Step 3: Cross multiply
    54,987.90x = 82,496.36 × 21,699.87
  4. Step 4: Simplify right side
    54,987.90x = 1,790,160,341.72
  5. Step 5: Solve for x
    x = 1,790,160,341.72/54,987.90
  6. Step 6: Final answer
    x = 32,555.53

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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.