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Finding the Fourth Proportional to 73.55, 101.48 and 47.31

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Solution

The fourth proportional to 73.55, 101.48 and 47.31 is: 65.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.55 : 101.48 = 47.31 : x
  2. Step 2: Convert to fraction form
    73.55/101.48 = 47.31/x
  3. Step 3: Cross multiply
    73.55x = 101.48 × 47.31
  4. Step 4: Simplify right side
    73.55x = 4,801.14
  5. Step 5: Solve for x
    x = 4,801.14/73.55
  6. Step 6: Final answer
    x = 65.28

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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.