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Finding the Fourth Proportional to 73.47, 101.28 and 61.83

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Solution

The fourth proportional to 73.47, 101.28 and 61.83 is: 85.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.47 : 101.28 = 61.83 : x
  2. Step 2: Convert to fraction form
    73.47/101.28 = 61.83/x
  3. Step 3: Cross multiply
    73.47x = 101.28 × 61.83
  4. Step 4: Simplify right side
    73.47x = 6,262.14
  5. Step 5: Solve for x
    x = 6,262.14/73.47
  6. Step 6: Final answer
    x = 85.23

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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.