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Finding the Fourth Proportional to 139.76, 192.96 and 130.08

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Solution

The fourth proportional to 139.76, 192.96 and 130.08 is: 179.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.76 : 192.96 = 130.08 : x
  2. Step 2: Convert to fraction form
    139.76/192.96 = 130.08/x
  3. Step 3: Cross multiply
    139.76x = 192.96 × 130.08
  4. Step 4: Simplify right side
    139.76x = 25,100.24
  5. Step 5: Solve for x
    x = 25,100.24/139.76
  6. Step 6: Final answer
    x = 179.60

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.