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Finding the Fourth Proportional to 95.83, 143.58 and 85.69

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Solution

The fourth proportional to 95.83, 143.58 and 85.69 is: 128.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.83 : 143.58 = 85.69 : x
  2. Step 2: Convert to fraction form
    95.83/143.58 = 85.69/x
  3. Step 3: Cross multiply
    95.83x = 143.58 × 85.69
  4. Step 4: Simplify right side
    95.83x = 12,303.37
  5. Step 5: Solve for x
    x = 12,303.37/95.83
  6. Step 6: Final answer
    x = 128.39

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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.