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Finding the Fourth Proportional to 114.98, 158.70 and 75.69

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Solution

The fourth proportional to 114.98, 158.70 and 75.69 is: 104.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.98 : 158.70 = 75.69 : x
  2. Step 2: Convert to fraction form
    114.98/158.70 = 75.69/x
  3. Step 3: Cross multiply
    114.98x = 158.70 × 75.69
  4. Step 4: Simplify right side
    114.98x = 12,012.00
  5. Step 5: Solve for x
    x = 12,012.00/114.98
  6. Step 6: Final answer
    x = 104.47

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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.