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Finding the Fourth Proportional to 73.99, 102.14 and 72.47

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Solution

The fourth proportional to 73.99, 102.14 and 72.47 is: 100.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.99 : 102.14 = 72.47 : x
  2. Step 2: Convert to fraction form
    73.99/102.14 = 72.47/x
  3. Step 3: Cross multiply
    73.99x = 102.14 × 72.47
  4. Step 4: Simplify right side
    73.99x = 7,401.76
  5. Step 5: Solve for x
    x = 7,401.76/73.99
  6. Step 6: Final answer
    x = 100.04

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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.