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Finding the Fourth Proportional to 71,622.36, 98,840.18 and 39,794.20

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Solution

The fourth proportional to 71,622.36, 98,840.18 and 39,794.20 is: 54,916.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,622.36 : 98,840.18 = 39,794.20 : x
  2. Step 2: Convert to fraction form
    71,622.36/98,840.18 = 39,794.20/x
  3. Step 3: Cross multiply
    71,622.36x = 98,840.18 × 39,794.20
  4. Step 4: Simplify right side
    71,622.36x = 3,933,265,890.96
  5. Step 5: Solve for x
    x = 3,933,265,890.96/71,622.36
  6. Step 6: Final answer
    x = 54,916.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.