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Finding the Fourth Proportional to 102.70, 143.60 and 102.70

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Solution

The fourth proportional to 102.70, 143.60 and 102.70 is: 143.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.70 : 143.60 = 102.70 : x
  2. Step 2: Convert to fraction form
    102.70/143.60 = 102.70/x
  3. Step 3: Cross multiply
    102.70x = 143.60 × 102.70
  4. Step 4: Simplify right side
    102.70x = 14,747.72
  5. Step 5: Solve for x
    x = 14,747.72/102.70
  6. Step 6: Final answer
    x = 143.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.