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Finding the Fourth Proportional to 71,185.60, 106,864.80 and 39,620.80

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Solution

The fourth proportional to 71,185.60, 106,864.80 and 39,620.80 is: 59,479.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,185.60 : 106,864.80 = 39,620.80 : x
  2. Step 2: Convert to fraction form
    71,185.60/106,864.80 = 39,620.80/x
  3. Step 3: Cross multiply
    71,185.60x = 106,864.80 × 39,620.80
  4. Step 4: Simplify right side
    71,185.60x = 4,234,068,867.84
  5. Step 5: Solve for x
    x = 4,234,068,867.84/71,185.60
  6. Step 6: Final answer
    x = 59,479.29

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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.