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Finding the Fourth Proportional to 85,466.91, 128,199.87 and 34,865.76

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Solution

The fourth proportional to 85,466.91, 128,199.87 and 34,865.76 is: 52,298.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,466.91 : 128,199.87 = 34,865.76 : x
  2. Step 2: Convert to fraction form
    85,466.91/128,199.87 = 34,865.76/x
  3. Step 3: Cross multiply
    85,466.91x = 128,199.87 × 34,865.76
  4. Step 4: Simplify right side
    85,466.91x = 4,469,785,899.45
  5. Step 5: Solve for x
    x = 4,469,785,899.45/85,466.91
  6. Step 6: Final answer
    x = 52,298.44

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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.