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Finding the Fourth Proportional to 80,856.70, 121,285.05 and 61,027.90

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Solution

The fourth proportional to 80,856.70, 121,285.05 and 61,027.90 is: 91,541.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,856.70 : 121,285.05 = 61,027.90 : x
  2. Step 2: Convert to fraction form
    80,856.70/121,285.05 = 61,027.90/x
  3. Step 3: Cross multiply
    80,856.70x = 121,285.05 × 61,027.90
  4. Step 4: Simplify right side
    80,856.70x = 7,401,771,902.90
  5. Step 5: Solve for x
    x = 7,401,771,902.90/80,856.70
  6. Step 6: Final answer
    x = 91,541.85

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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.