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Finding the Fourth Proportional to 100.20, 150.03 and 72.93

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Solution

The fourth proportional to 100.20, 150.03 and 72.93 is: 109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.20 : 150.03 = 72.93 : x
  2. Step 2: Convert to fraction form
    100.20/150.03 = 72.93/x
  3. Step 3: Cross multiply
    100.20x = 150.03 × 72.93
  4. Step 4: Simplify right side
    100.20x = 10,941.69
  5. Step 5: Solve for x
    x = 10,941.69/100.20
  6. Step 6: Final answer
    x = 109.20

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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.