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Finding the Fourth Proportional to 72, 99.36 and 44.36

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Solution

The fourth proportional to 72, 99.36 and 44.36 is: 61.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72 : 99.36 = 44.36 : x
  2. Step 2: Convert to fraction form
    72/99.36 = 44.36/x
  3. Step 3: Cross multiply
    72x = 99.36 × 44.36
  4. Step 4: Simplify right side
    72x = 4,407.11
  5. Step 5: Solve for x
    x = 4,407.11/72
  6. Step 6: Final answer
    x = 61.21

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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.