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Finding the Fourth Proportional to 71,151.40, 106,639.62 and 39,921.04

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Solution

The fourth proportional to 71,151.40, 106,639.62 and 39,921.04 is: 59,832.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,151.40 : 106,639.62 = 39,921.04 : x
  2. Step 2: Convert to fraction form
    71,151.40/106,639.62 = 39,921.04/x
  3. Step 3: Cross multiply
    71,151.40x = 106,639.62 × 39,921.04
  4. Step 4: Simplify right side
    71,151.40x = 4,257,164,535.60
  5. Step 5: Solve for x
    x = 4,257,164,535.60/71,151.40
  6. Step 6: Final answer
    x = 59,832.48

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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.