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Finding the Fourth Proportional to 135.06, 186.35 and 90.86

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Solution

The fourth proportional to 135.06, 186.35 and 90.86 is: 125.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.06 : 186.35 = 90.86 : x
  2. Step 2: Convert to fraction form
    135.06/186.35 = 90.86/x
  3. Step 3: Cross multiply
    135.06x = 186.35 × 90.86
  4. Step 4: Simplify right side
    135.06x = 16,931.77
  5. Step 5: Solve for x
    x = 16,931.77/135.06
  6. Step 6: Final answer
    x = 125.36

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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.