Home / 90,743.90-136,074.20-53,321.56

Finding the Fourth Proportional to 90,743.90, 136,074.20 and 53,321.56

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Solution

The fourth proportional to 90,743.90, 136,074.20 and 53,321.56 is: 79,957.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,743.90 : 136,074.20 = 53,321.56 : x
  2. Step 2: Convert to fraction form
    90,743.90/136,074.20 = 53,321.56/x
  3. Step 3: Cross multiply
    90,743.90x = 136,074.20 × 53,321.56
  4. Step 4: Simplify right side
    90,743.90x = 7,255,688,012.96
  5. Step 5: Solve for x
    x = 7,255,688,012.96/90,743.90
  6. Step 6: Final answer
    x = 79,957.86

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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.