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Finding the Fourth Proportional to 139.77, 208.53 and 134.52

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Solution

The fourth proportional to 139.77, 208.53 and 134.52 is: 200.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.77 : 208.53 = 134.52 : x
  2. Step 2: Convert to fraction form
    139.77/208.53 = 134.52/x
  3. Step 3: Cross multiply
    139.77x = 208.53 × 134.52
  4. Step 4: Simplify right side
    139.77x = 28,051.46
  5. Step 5: Solve for x
    x = 28,051.46/139.77
  6. Step 6: Final answer
    x = 200.70

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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.