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Finding the Fourth Proportional to 85,960.32, 128,880 and 33,325.44

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Solution

The fourth proportional to 85,960.32, 128,880 and 33,325.44 is: 49,964.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,960.32 : 128,880 = 33,325.44 : x
  2. Step 2: Convert to fraction form
    85,960.32/128,880 = 33,325.44/x
  3. Step 3: Cross multiply
    85,960.32x = 128,880 × 33,325.44
  4. Step 4: Simplify right side
    85,960.32x = 4,294,982,707.20
  5. Step 5: Solve for x
    x = 4,294,982,707.20/85,960.32
  6. Step 6: Final answer
    x = 49,964.71

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1.5x scale

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.