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Finding the Fourth Proportional to 73.58, 109.58 and 72.95

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Solution

The fourth proportional to 73.58, 109.58 and 72.95 is: 108.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.58 : 109.58 = 72.95 : x
  2. Step 2: Convert to fraction form
    73.58/109.58 = 72.95/x
  3. Step 3: Cross multiply
    73.58x = 109.58 × 72.95
  4. Step 4: Simplify right side
    73.58x = 7,992.95
  5. Step 5: Solve for x
    x = 7,992.95/73.58
  6. Step 6: Final answer
    x = 108.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.