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Finding the Fourth Proportional to 307,542.92, 461,391.18 and 85,925

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Solution

The fourth proportional to 307,542.92, 461,391.18 and 85,925 is: 128,908.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,542.92 : 461,391.18 = 85,925 : x
  2. Step 2: Convert to fraction form
    307,542.92/461,391.18 = 85,925/x
  3. Step 3: Cross multiply
    307,542.92x = 461,391.18 × 85,925
  4. Step 4: Simplify right side
    307,542.92x = 39,645,037,141.50
  5. Step 5: Solve for x
    x = 39,645,037,141.50/307,542.92
  6. Step 6: Final answer
    x = 128,908.96

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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.