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Finding the Fourth Proportional to 95.64, 143.28 and 47.58

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Solution

The fourth proportional to 95.64, 143.28 and 47.58 is: 71.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.64 : 143.28 = 47.58 : x
  2. Step 2: Convert to fraction form
    95.64/143.28 = 47.58/x
  3. Step 3: Cross multiply
    95.64x = 143.28 × 47.58
  4. Step 4: Simplify right side
    95.64x = 6,817.26
  5. Step 5: Solve for x
    x = 6,817.26/95.64
  6. Step 6: Final answer
    x = 71.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.