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Finding the Fourth Proportional to 81,410.60, 122,115.90 and 60,415.40

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Solution

The fourth proportional to 81,410.60, 122,115.90 and 60,415.40 is: 90,623.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,410.60 : 122,115.90 = 60,415.40 : x
  2. Step 2: Convert to fraction form
    81,410.60/122,115.90 = 60,415.40/x
  3. Step 3: Cross multiply
    81,410.60x = 122,115.90 × 60,415.40
  4. Step 4: Simplify right side
    81,410.60x = 7,377,680,944.86
  5. Step 5: Solve for x
    x = 7,377,680,944.86/81,410.60
  6. Step 6: Final answer
    x = 90,623.10

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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.