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Finding the Fourth Proportional to 96.04, 143.06 and 86.32

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Solution

The fourth proportional to 96.04, 143.06 and 86.32 is: 128.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.04 : 143.06 = 86.32 : x
  2. Step 2: Convert to fraction form
    96.04/143.06 = 86.32/x
  3. Step 3: Cross multiply
    96.04x = 143.06 × 86.32
  4. Step 4: Simplify right side
    96.04x = 12,348.94
  5. Step 5: Solve for x
    x = 12,348.94/96.04
  6. Step 6: Final answer
    x = 128.58

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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.