Home / 137,205.20-189,351.96-76,782.80

Finding the Fourth Proportional to 137,205.20, 189,351.96 and 76,782.80

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Solution

The fourth proportional to 137,205.20, 189,351.96 and 76,782.80 is: 105,965.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,205.20 : 189,351.96 = 76,782.80 : x
  2. Step 2: Convert to fraction form
    137,205.20/189,351.96 = 76,782.80/x
  3. Step 3: Cross multiply
    137,205.20x = 189,351.96 × 76,782.80
  4. Step 4: Simplify right side
    137,205.20x = 14,538,973,674.29
  5. Step 5: Solve for x
    x = 14,538,973,674.29/137,205.20
  6. Step 6: Final answer
    x = 105,965.18

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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.