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Finding the Fourth Proportional to 54.47, 81.34 and 49.01

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Solution

The fourth proportional to 54.47, 81.34 and 49.01 is: 73.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.47 : 81.34 = 49.01 : x
  2. Step 2: Convert to fraction form
    54.47/81.34 = 49.01/x
  3. Step 3: Cross multiply
    54.47x = 81.34 × 49.01
  4. Step 4: Simplify right side
    54.47x = 3,985.94
  5. Step 5: Solve for x
    x = 3,985.94/54.47
  6. Step 6: Final answer
    x = 73.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.