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Finding the Fourth Proportional to 73.10, 99.56 and 72.87

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Solution

The fourth proportional to 73.10, 99.56 and 72.87 is: 99.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.10 : 99.56 = 72.87 : x
  2. Step 2: Convert to fraction form
    73.10/99.56 = 72.87/x
  3. Step 3: Cross multiply
    73.10x = 99.56 × 72.87
  4. Step 4: Simplify right side
    73.10x = 7,254.57
  5. Step 5: Solve for x
    x = 7,254.57/73.10
  6. Step 6: Final answer
    x = 99.25

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.