Home / 90,783.20-136,320.60-68,621.60

Finding the Fourth Proportional to 90,783.20, 136,320.60 and 68,621.60

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Solution

The fourth proportional to 90,783.20, 136,320.60 and 68,621.60 is: 103,042.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,783.20 : 136,320.60 = 68,621.60 : x
  2. Step 2: Convert to fraction form
    90,783.20/136,320.60 = 68,621.60/x
  3. Step 3: Cross multiply
    90,783.20x = 136,320.60 × 68,621.60
  4. Step 4: Simplify right side
    90,783.20x = 9,354,537,684.96
  5. Step 5: Solve for x
    x = 9,354,537,684.96/90,783.20
  6. Step 6: Final answer
    x = 103,042.61

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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.