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Finding the Fourth Proportional to 54,321.53, 81,484.81 and 28,077.53

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Solution

The fourth proportional to 54,321.53, 81,484.81 and 28,077.53 is: 42,117.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,321.53 : 81,484.81 = 28,077.53 : x
  2. Step 2: Convert to fraction form
    54,321.53/81,484.81 = 28,077.53/x
  3. Step 3: Cross multiply
    54,321.53x = 81,484.81 × 28,077.53
  4. Step 4: Simplify right side
    54,321.53x = 2,287,891,719.70
  5. Step 5: Solve for x
    x = 2,287,891,719.70/54,321.53
  6. Step 6: Final answer
    x = 42,117.59

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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.