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Finding the Fourth Proportional to 159.36, 237.72 and 139.92

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Solution

The fourth proportional to 159.36, 237.72 and 139.92 is: 208.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.36 : 237.72 = 139.92 : x
  2. Step 2: Convert to fraction form
    159.36/237.72 = 139.92/x
  3. Step 3: Cross multiply
    159.36x = 237.72 × 139.92
  4. Step 4: Simplify right side
    159.36x = 33,261.78
  5. Step 5: Solve for x
    x = 33,261.78/159.36
  6. Step 6: Final answer
    x = 208.72

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