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Finding the Fourth Proportional to 96.06, 143.28 and 85.86

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Solution

The fourth proportional to 96.06, 143.28 and 85.86 is: 128.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.06 : 143.28 = 85.86 : x
  2. Step 2: Convert to fraction form
    96.06/143.28 = 85.86/x
  3. Step 3: Cross multiply
    96.06x = 143.28 × 85.86
  4. Step 4: Simplify right side
    96.06x = 12,302.02
  5. Step 5: Solve for x
    x = 12,302.02/96.06
  6. Step 6: Final answer
    x = 128.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.