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Finding the Fourth Proportional to 114.12, 157.33 and 90.88

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Solution

The fourth proportional to 114.12, 157.33 and 90.88 is: 125.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.12 : 157.33 = 90.88 : x
  2. Step 2: Convert to fraction form
    114.12/157.33 = 90.88/x
  3. Step 3: Cross multiply
    114.12x = 157.33 × 90.88
  4. Step 4: Simplify right side
    114.12x = 14,298.15
  5. Step 5: Solve for x
    x = 14,298.15/114.12
  6. Step 6: Final answer
    x = 125.29

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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.