Home / 137,119.50-189,246.78-80,519.94

Finding the Fourth Proportional to 137,119.50, 189,246.78 and 80,519.94

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Solution

The fourth proportional to 137,119.50, 189,246.78 and 80,519.94 is: 111,130.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,119.50 : 189,246.78 = 80,519.94 : x
  2. Step 2: Convert to fraction form
    137,119.50/189,246.78 = 80,519.94/x
  3. Step 3: Cross multiply
    137,119.50x = 189,246.78 × 80,519.94
  4. Step 4: Simplify right side
    137,119.50x = 15,238,139,370.79
  5. Step 5: Solve for x
    x = 15,238,139,370.79/137,119.50
  6. Step 6: Final answer
    x = 111,130.36

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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.