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Finding the Fourth Proportional to 114.47, 157.77 and 91.11

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Solution

The fourth proportional to 114.47, 157.77 and 91.11 is: 125.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.47 : 157.77 = 91.11 : x
  2. Step 2: Convert to fraction form
    114.47/157.77 = 91.11/x
  3. Step 3: Cross multiply
    114.47x = 157.77 × 91.11
  4. Step 4: Simplify right side
    114.47x = 14,374.42
  5. Step 5: Solve for x
    x = 14,374.42/114.47
  6. Step 6: Final answer
    x = 125.57

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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.