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Finding the Fourth Proportional to 235.66, 325.21 and 137.50

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Solution

The fourth proportional to 235.66, 325.21 and 137.50 is: 189.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.66 : 325.21 = 137.50 : x
  2. Step 2: Convert to fraction form
    235.66/325.21 = 137.50/x
  3. Step 3: Cross multiply
    235.66x = 325.21 × 137.50
  4. Step 4: Simplify right side
    235.66x = 44,714.06
  5. Step 5: Solve for x
    x = 44,714.06/235.66
  6. Step 6: Final answer
    x = 189.74

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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.