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Finding the Fourth Proportional to 72.76, 109.63 and 62.59

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Solution

The fourth proportional to 72.76, 109.63 and 62.59 is: 94.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.76 : 109.63 = 62.59 : x
  2. Step 2: Convert to fraction form
    72.76/109.63 = 62.59/x
  3. Step 3: Cross multiply
    72.76x = 109.63 × 62.59
  4. Step 4: Simplify right side
    72.76x = 6,861.74
  5. Step 5: Solve for x
    x = 6,861.74/72.76
  6. Step 6: Final answer
    x = 94.31

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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.