Home / 90,785.20-136,323.60-68,623.60

Finding the Fourth Proportional to 90,785.20, 136,323.60 and 68,623.60

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Solution

The fourth proportional to 90,785.20, 136,323.60 and 68,623.60 is: 103,045.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,785.20 : 136,323.60 = 68,623.60 : x
  2. Step 2: Convert to fraction form
    90,785.20/136,323.60 = 68,623.60/x
  3. Step 3: Cross multiply
    90,785.20x = 136,323.60 × 68,623.60
  4. Step 4: Simplify right side
    90,785.20x = 9,355,016,196.96
  5. Step 5: Solve for x
    x = 9,355,016,196.96/90,785.20
  6. Step 6: Final answer
    x = 103,045.61

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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.