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Finding the Fourth Proportional to 100.94, 139.00 and 83.32

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Solution

The fourth proportional to 100.94, 139.00 and 83.32 is: 114.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.94 : 139.00 = 83.32 : x
  2. Step 2: Convert to fraction form
    100.94/139.00 = 83.32/x
  3. Step 3: Cross multiply
    100.94x = 139.00 × 83.32
  4. Step 4: Simplify right side
    100.94x = 11,581.62
  5. Step 5: Solve for x
    x = 11,581.62/100.94
  6. Step 6: Final answer
    x = 114.74

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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.