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Finding the Fourth Proportional to 102.93, 155.01 and 91.62

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Solution

The fourth proportional to 102.93, 155.01 and 91.62 is: 137.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.93 : 155.01 = 91.62 : x
  2. Step 2: Convert to fraction form
    102.93/155.01 = 91.62/x
  3. Step 3: Cross multiply
    102.93x = 155.01 × 91.62
  4. Step 4: Simplify right side
    102.93x = 14,202.02
  5. Step 5: Solve for x
    x = 14,202.02/102.93
  6. Step 6: Final answer
    x = 137.98

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.