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Finding the Fourth Proportional to 100.47, 139.56 and 97.59

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Solution

The fourth proportional to 100.47, 139.56 and 97.59 is: 135.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.47 : 139.56 = 97.59 : x
  2. Step 2: Convert to fraction form
    100.47/139.56 = 97.59/x
  3. Step 3: Cross multiply
    100.47x = 139.56 × 97.59
  4. Step 4: Simplify right side
    100.47x = 13,619.66
  5. Step 5: Solve for x
    x = 13,619.66/100.47
  6. Step 6: Final answer
    x = 135.56

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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.