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Finding the Fourth Proportional to 134.77, 185.88 and 90.43

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Solution

The fourth proportional to 134.77, 185.88 and 90.43 is: 124.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.77 : 185.88 = 90.43 : x
  2. Step 2: Convert to fraction form
    134.77/185.88 = 90.43/x
  3. Step 3: Cross multiply
    134.77x = 185.88 × 90.43
  4. Step 4: Simplify right side
    134.77x = 16,809.13
  5. Step 5: Solve for x
    x = 16,809.13/134.77
  6. Step 6: Final answer
    x = 124.72

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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.