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Finding the Fourth Proportional to 71,322.20, 106,983.30 and 38,029.40

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Solution

The fourth proportional to 71,322.20, 106,983.30 and 38,029.40 is: 57,044.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,322.20 : 106,983.30 = 38,029.40 : x
  2. Step 2: Convert to fraction form
    71,322.20/106,983.30 = 38,029.40/x
  3. Step 3: Cross multiply
    71,322.20x = 106,983.30 × 38,029.40
  4. Step 4: Simplify right side
    71,322.20x = 4,068,510,709.02
  5. Step 5: Solve for x
    x = 4,068,510,709.02/71,322.20
  6. Step 6: Final answer
    x = 57,044.10

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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.