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Finding the Fourth Proportional to 71,911.20, 107,823.60 and 36,919.20

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Solution

The fourth proportional to 71,911.20, 107,823.60 and 36,919.20 is: 55,356.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,911.20 : 107,823.60 = 36,919.20 : x
  2. Step 2: Convert to fraction form
    71,911.20/107,823.60 = 36,919.20/x
  3. Step 3: Cross multiply
    71,911.20x = 107,823.60 × 36,919.20
  4. Step 4: Simplify right side
    71,911.20x = 3,980,761,053.12
  5. Step 5: Solve for x
    x = 3,980,761,053.12/71,911.20
  6. Step 6: Final answer
    x = 55,356.62

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1.5x scale

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.