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Finding the Fourth Proportional to 73.51, 101.23 and 71.91

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Solution

The fourth proportional to 73.51, 101.23 and 71.91 is: 99.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.51 : 101.23 = 71.91 : x
  2. Step 2: Convert to fraction form
    73.51/101.23 = 71.91/x
  3. Step 3: Cross multiply
    73.51x = 101.23 × 71.91
  4. Step 4: Simplify right side
    73.51x = 7,279.86
  5. Step 5: Solve for x
    x = 7,279.86/73.51
  6. Step 6: Final answer
    x = 99.04

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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.