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Finding the Fourth Proportional to 73.10, 100.54 and 61.36

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Solution

The fourth proportional to 73.10, 100.54 and 61.36 is: 84.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.10 : 100.54 = 61.36 : x
  2. Step 2: Convert to fraction form
    73.10/100.54 = 61.36/x
  3. Step 3: Cross multiply
    73.10x = 100.54 × 61.36
  4. Step 4: Simplify right side
    73.10x = 6,168.96
  5. Step 5: Solve for x
    x = 6,168.96/73.10
  6. Step 6: Final answer
    x = 84.39

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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.