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Finding the Fourth Proportional to 73.36, 101.15 and 65.15

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Solution

The fourth proportional to 73.36, 101.15 and 65.15 is: 89.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.36 : 101.15 = 65.15 : x
  2. Step 2: Convert to fraction form
    73.36/101.15 = 65.15/x
  3. Step 3: Cross multiply
    73.36x = 101.15 × 65.15
  4. Step 4: Simplify right side
    73.36x = 6,590.28
  5. Step 5: Solve for x
    x = 6,590.28/73.36
  6. Step 6: Final answer
    x = 89.84

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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.