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Finding the Fourth Proportional to 114.07, 157.40 and 72.55

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Solution

The fourth proportional to 114.07, 157.40 and 72.55 is: 100.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.07 : 157.40 = 72.55 : x
  2. Step 2: Convert to fraction form
    114.07/157.40 = 72.55/x
  3. Step 3: Cross multiply
    114.07x = 157.40 × 72.55
  4. Step 4: Simplify right side
    114.07x = 11,419.37
  5. Step 5: Solve for x
    x = 11,419.37/114.07
  6. Step 6: Final answer
    x = 100.11

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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.