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Finding the Fourth Proportional to 102.03, 140.77 and 62.72

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Solution

The fourth proportional to 102.03, 140.77 and 62.72 is: 86.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.03 : 140.77 = 62.72 : x
  2. Step 2: Convert to fraction form
    102.03/140.77 = 62.72/x
  3. Step 3: Cross multiply
    102.03x = 140.77 × 62.72
  4. Step 4: Simplify right side
    102.03x = 8,829.79
  5. Step 5: Solve for x
    x = 8,829.79/102.03
  6. Step 6: Final answer
    x = 86.54

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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.