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Finding the Fourth Proportional to 73.04, 109.64 and 72.77

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Solution

The fourth proportional to 73.04, 109.64 and 72.77 is: 109.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.04 : 109.64 = 72.77 : x
  2. Step 2: Convert to fraction form
    73.04/109.64 = 72.77/x
  3. Step 3: Cross multiply
    73.04x = 109.64 × 72.77
  4. Step 4: Simplify right side
    73.04x = 7,978.58
  5. Step 5: Solve for x
    x = 7,978.58/73.04
  6. Step 6: Final answer
    x = 109.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.