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Finding the Fourth Proportional to 73.88, 101.21 and 70.60

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Solution

The fourth proportional to 73.88, 101.21 and 70.60 is: 96.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.88 : 101.21 = 70.60 : x
  2. Step 2: Convert to fraction form
    73.88/101.21 = 70.60/x
  3. Step 3: Cross multiply
    73.88x = 101.21 × 70.60
  4. Step 4: Simplify right side
    73.88x = 7,145.43
  5. Step 5: Solve for x
    x = 7,145.43/73.88
  6. Step 6: Final answer
    x = 96.72

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.