Home / 90,826.20-136,469.70-80,688.60

Finding the Fourth Proportional to 90,826.20, 136,469.70 and 80,688.60

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Solution

The fourth proportional to 90,826.20, 136,469.70 and 80,688.60 is: 121,237.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,826.20 : 136,469.70 = 80,688.60 : x
  2. Step 2: Convert to fraction form
    90,826.20/136,469.70 = 80,688.60/x
  3. Step 3: Cross multiply
    90,826.20x = 136,469.70 × 80,688.60
  4. Step 4: Simplify right side
    90,826.20x = 11,011,549,035.42
  5. Step 5: Solve for x
    x = 11,011,549,035.42/90,826.20
  6. Step 6: Final answer
    x = 121,237.58

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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.