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Finding the Fourth Proportional to 74.08, 102.17 and 58.51

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Solution

The fourth proportional to 74.08, 102.17 and 58.51 is: 80.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.08 : 102.17 = 58.51 : x
  2. Step 2: Convert to fraction form
    74.08/102.17 = 58.51/x
  3. Step 3: Cross multiply
    74.08x = 102.17 × 58.51
  4. Step 4: Simplify right side
    74.08x = 5,977.86
  5. Step 5: Solve for x
    x = 5,977.86/74.08
  6. Step 6: Final answer
    x = 80.70

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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.