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Finding the Fourth Proportional to 73.48, 101.76 and 68.20

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Solution

The fourth proportional to 73.48, 101.76 and 68.20 is: 94.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.48 : 101.76 = 68.20 : x
  2. Step 2: Convert to fraction form
    73.48/101.76 = 68.20/x
  3. Step 3: Cross multiply
    73.48x = 101.76 × 68.20
  4. Step 4: Simplify right side
    73.48x = 6,940.03
  5. Step 5: Solve for x
    x = 6,940.03/73.48
  6. Step 6: Final answer
    x = 94.45

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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.