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Finding the Fourth Proportional to 85,792.34, 128,652.87 and 33,171.50

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Solution

The fourth proportional to 85,792.34, 128,652.87 and 33,171.50 is: 49,743.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,792.34 : 128,652.87 = 33,171.50 : x
  2. Step 2: Convert to fraction form
    85,792.34/128,652.87 = 33,171.50/x
  3. Step 3: Cross multiply
    85,792.34x = 128,652.87 × 33,171.50
  4. Step 4: Simplify right side
    85,792.34x = 4,267,608,677.21
  5. Step 5: Solve for x
    x = 4,267,608,677.21/85,792.34
  6. Step 6: Final answer
    x = 49,743.47

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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.