Home / 137,220.20-189,372.66-76,797.80

Finding the Fourth Proportional to 137,220.20, 189,372.66 and 76,797.80

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Solution

The fourth proportional to 137,220.20, 189,372.66 and 76,797.80 is: 105,985.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,220.20 : 189,372.66 = 76,797.80 : x
  2. Step 2: Convert to fraction form
    137,220.20/189,372.66 = 76,797.80/x
  3. Step 3: Cross multiply
    137,220.20x = 189,372.66 × 76,797.80
  4. Step 4: Simplify right side
    137,220.20x = 14,543,403,668.15
  5. Step 5: Solve for x
    x = 14,543,403,668.15/137,220.20
  6. Step 6: Final answer
    x = 105,985.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.