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Finding the Fourth Proportional to 161.13, 240.53 and 139.60

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Solution

The fourth proportional to 161.13, 240.53 and 139.60 is: 208.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.13 : 240.53 = 139.60 : x
  2. Step 2: Convert to fraction form
    161.13/240.53 = 139.60/x
  3. Step 3: Cross multiply
    161.13x = 240.53 × 139.60
  4. Step 4: Simplify right side
    161.13x = 33,577.59
  5. Step 5: Solve for x
    x = 33,577.59/161.13
  6. Step 6: Final answer
    x = 208.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.