Home / 221,857.38-306,163.08-121,255.38

Finding the Fourth Proportional to 221,857.38, 306,163.08 and 121,255.38

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Solution

The fourth proportional to 221,857.38, 306,163.08 and 121,255.38 is: 167,332.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,857.38 : 306,163.08 = 121,255.38 : x
  2. Step 2: Convert to fraction form
    221,857.38/306,163.08 = 121,255.38/x
  3. Step 3: Cross multiply
    221,857.38x = 306,163.08 × 121,255.38
  4. Step 4: Simplify right side
    221,857.38x = 37,123,920,607.37
  5. Step 5: Solve for x
    x = 37,123,920,607.37/221,857.38
  6. Step 6: Final answer
    x = 167,332.37

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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.