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Finding the Fourth Proportional to 85,690.52, 128,515.08 and 33,066.44

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Solution

The fourth proportional to 85,690.52, 128,515.08 and 33,066.44 is: 49,591.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,690.52 : 128,515.08 = 33,066.44 : x
  2. Step 2: Convert to fraction form
    85,690.52/128,515.08 = 33,066.44/x
  3. Step 3: Cross multiply
    85,690.52x = 128,515.08 × 33,066.44
  4. Step 4: Simplify right side
    85,690.52x = 4,249,536,181.92
  5. Step 5: Solve for x
    x = 4,249,536,181.92/85,690.52
  6. Step 6: Final answer
    x = 49,591.67

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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.