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Finding the Fourth Proportional to 235.95, 325.60 and 137.76

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Solution

The fourth proportional to 235.95, 325.60 and 137.76 is: 190.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.95 : 325.60 = 137.76 : x
  2. Step 2: Convert to fraction form
    235.95/325.60 = 137.76/x
  3. Step 3: Cross multiply
    235.95x = 325.60 × 137.76
  4. Step 4: Simplify right side
    235.95x = 44,854.66
  5. Step 5: Solve for x
    x = 44,854.66/235.95
  6. Step 6: Final answer
    x = 190.10

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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.