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Finding the Fourth Proportional to 48,611.60, 72,917.40 and 45,331.10

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Solution

The fourth proportional to 48,611.60, 72,917.40 and 45,331.10 is: 67,996.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,611.60 : 72,917.40 = 45,331.10 : x
  2. Step 2: Convert to fraction form
    48,611.60/72,917.40 = 45,331.10/x
  3. Step 3: Cross multiply
    48,611.60x = 72,917.40 × 45,331.10
  4. Step 4: Simplify right side
    48,611.60x = 3,305,425,951.14
  5. Step 5: Solve for x
    x = 3,305,425,951.14/48,611.60
  6. Step 6: Final answer
    x = 67,996.65

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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.