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Finding the Fourth Proportional to 102.94, 143.06 and 101.86

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Solution

The fourth proportional to 102.94, 143.06 and 101.86 is: 141.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.94 : 143.06 = 101.86 : x
  2. Step 2: Convert to fraction form
    102.94/143.06 = 101.86/x
  3. Step 3: Cross multiply
    102.94x = 143.06 × 101.86
  4. Step 4: Simplify right side
    102.94x = 14,572.09
  5. Step 5: Solve for x
    x = 14,572.09/102.94
  6. Step 6: Final answer
    x = 141.56

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.