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Finding the Fourth Proportional to 73.32, 100.89 and 72.06

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Solution

The fourth proportional to 73.32, 100.89 and 72.06 is: 99.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.32 : 100.89 = 72.06 : x
  2. Step 2: Convert to fraction form
    73.32/100.89 = 72.06/x
  3. Step 3: Cross multiply
    73.32x = 100.89 × 72.06
  4. Step 4: Simplify right side
    73.32x = 7,270.13
  5. Step 5: Solve for x
    x = 7,270.13/73.32
  6. Step 6: Final answer
    x = 99.16

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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.