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Finding the Fourth Proportional to 101.74, 152.72 and 56.11

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Solution

The fourth proportional to 101.74, 152.72 and 56.11 is: 84.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.74 : 152.72 = 56.11 : x
  2. Step 2: Convert to fraction form
    101.74/152.72 = 56.11/x
  3. Step 3: Cross multiply
    101.74x = 152.72 × 56.11
  4. Step 4: Simplify right side
    101.74x = 8,569.12
  5. Step 5: Solve for x
    x = 8,569.12/101.74
  6. Step 6: Final answer
    x = 84.23

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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.