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Finding the Fourth Proportional to 114.47, 157.95 and 91.17

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Solution

The fourth proportional to 114.47, 157.95 and 91.17 is: 125.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.47 : 157.95 = 91.17 : x
  2. Step 2: Convert to fraction form
    114.47/157.95 = 91.17/x
  3. Step 3: Cross multiply
    114.47x = 157.95 × 91.17
  4. Step 4: Simplify right side
    114.47x = 14,400.30
  5. Step 5: Solve for x
    x = 14,400.30/114.47
  6. Step 6: Final answer
    x = 125.81

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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.