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Finding the Fourth Proportional to 71,575.40, 107,363.10 and 70,919.30

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Solution

The fourth proportional to 71,575.40, 107,363.10 and 70,919.30 is: 106,378.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,575.40 : 107,363.10 = 70,919.30 : x
  2. Step 2: Convert to fraction form
    71,575.40/107,363.10 = 70,919.30/x
  3. Step 3: Cross multiply
    71,575.40x = 107,363.10 × 70,919.30
  4. Step 4: Simplify right side
    71,575.40x = 7,614,115,897.83
  5. Step 5: Solve for x
    x = 7,614,115,897.83/71,575.40
  6. Step 6: Final answer
    x = 106,378.95

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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.