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Finding the Fourth Proportional to 54,757.93, 81,988.49 and 28,407.31

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Solution

The fourth proportional to 54,757.93, 81,988.49 and 28,407.31 is: 42,533.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,757.93 : 81,988.49 = 28,407.31 : x
  2. Step 2: Convert to fraction form
    54,757.93/81,988.49 = 28,407.31/x
  3. Step 3: Cross multiply
    54,757.93x = 81,988.49 × 28,407.31
  4. Step 4: Simplify right side
    54,757.93x = 2,329,072,619.30
  5. Step 5: Solve for x
    x = 2,329,072,619.30/54,757.93
  6. Step 6: Final answer
    x = 42,533.98

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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.