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Finding the Fourth Proportional to 71.08, 97.98 and 45.19

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Solution

The fourth proportional to 71.08, 97.98 and 45.19 is: 62.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.08 : 97.98 = 45.19 : x
  2. Step 2: Convert to fraction form
    71.08/97.98 = 45.19/x
  3. Step 3: Cross multiply
    71.08x = 97.98 × 45.19
  4. Step 4: Simplify right side
    71.08x = 4,427.72
  5. Step 5: Solve for x
    x = 4,427.72/71.08
  6. Step 6: Final answer
    x = 62.29

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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.