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Finding the Fourth Proportional to 85,912.60, 128,901.30 and 41,578.60

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Solution

The fourth proportional to 85,912.60, 128,901.30 and 41,578.60 is: 62,383.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,912.60 : 128,901.30 = 41,578.60 : x
  2. Step 2: Convert to fraction form
    85,912.60/128,901.30 = 41,578.60/x
  3. Step 3: Cross multiply
    85,912.60x = 128,901.30 × 41,578.60
  4. Step 4: Simplify right side
    85,912.60x = 5,359,535,592.18
  5. Step 5: Solve for x
    x = 5,359,535,592.18/85,912.60
  6. Step 6: Final answer
    x = 62,383.58

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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.