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Finding the Fourth Proportional to 73.58, 101.50 and 57.18

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Solution

The fourth proportional to 73.58, 101.50 and 57.18 is: 78.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.58 : 101.50 = 57.18 : x
  2. Step 2: Convert to fraction form
    73.58/101.50 = 57.18/x
  3. Step 3: Cross multiply
    73.58x = 101.50 × 57.18
  4. Step 4: Simplify right side
    73.58x = 5,803.77
  5. Step 5: Solve for x
    x = 5,803.77/73.58
  6. Step 6: Final answer
    x = 78.88

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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.