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Finding the Fourth Proportional to 72.04, 99.30 and 67.54

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Solution

The fourth proportional to 72.04, 99.30 and 67.54 is: 93.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.04 : 99.30 = 67.54 : x
  2. Step 2: Convert to fraction form
    72.04/99.30 = 67.54/x
  3. Step 3: Cross multiply
    72.04x = 99.30 × 67.54
  4. Step 4: Simplify right side
    72.04x = 6,706.72
  5. Step 5: Solve for x
    x = 6,706.72/72.04
  6. Step 6: Final answer
    x = 93.10

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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.