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Finding the Fourth Proportional to 73.79, 101.80 and 47.55

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Solution

The fourth proportional to 73.79, 101.80 and 47.55 is: 65.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.79 : 101.80 = 47.55 : x
  2. Step 2: Convert to fraction form
    73.79/101.80 = 47.55/x
  3. Step 3: Cross multiply
    73.79x = 101.80 × 47.55
  4. Step 4: Simplify right side
    73.79x = 4,841.03
  5. Step 5: Solve for x
    x = 4,841.03/73.79
  6. Step 6: Final answer
    x = 65.61

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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.