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Finding the Fourth Proportional to 54.66, 75.30 and 42.87

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Solution

The fourth proportional to 54.66, 75.30 and 42.87 is: 59.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.66 : 75.30 = 42.87 : x
  2. Step 2: Convert to fraction form
    54.66/75.30 = 42.87/x
  3. Step 3: Cross multiply
    54.66x = 75.30 × 42.87
  4. Step 4: Simplify right side
    54.66x = 3,228.11
  5. Step 5: Solve for x
    x = 3,228.11/54.66
  6. Step 6: Final answer
    x = 59.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.