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Finding the Fourth Proportional to 113.06, 155.93 and 75.74

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Solution

The fourth proportional to 113.06, 155.93 and 75.74 is: 104.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.06 : 155.93 = 75.74 : x
  2. Step 2: Convert to fraction form
    113.06/155.93 = 75.74/x
  3. Step 3: Cross multiply
    113.06x = 155.93 × 75.74
  4. Step 4: Simplify right side
    113.06x = 11,808.98
  5. Step 5: Solve for x
    x = 11,808.98/113.06
  6. Step 6: Final answer
    x = 104.45

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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.