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Finding the Fourth Proportional to 111.76, 153.94 and 93.34

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Solution

The fourth proportional to 111.76, 153.94 and 93.34 is: 128.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.76 : 153.94 = 93.34 : x
  2. Step 2: Convert to fraction form
    111.76/153.94 = 93.34/x
  3. Step 3: Cross multiply
    111.76x = 153.94 × 93.34
  4. Step 4: Simplify right side
    111.76x = 14,368.76
  5. Step 5: Solve for x
    x = 14,368.76/111.76
  6. Step 6: Final answer
    x = 128.57

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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.