Home / 245,995.81-339,429.12-138,542.83

Finding the Fourth Proportional to 245,995.81, 339,429.12 and 138,542.83

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Solution

The fourth proportional to 245,995.81, 339,429.12 and 138,542.83 is: 191,163.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,995.81 : 339,429.12 = 138,542.83 : x
  2. Step 2: Convert to fraction form
    245,995.81/339,429.12 = 138,542.83/x
  3. Step 3: Cross multiply
    245,995.81x = 339,429.12 × 138,542.83
  4. Step 4: Simplify right side
    245,995.81x = 47,025,470,869.21
  5. Step 5: Solve for x
    x = 47,025,470,869.21/245,995.81
  6. Step 6: Final answer
    x = 191,163.71

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1.5x scale

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.