Home / 218,519.37-301,561.89-121,729.74

Finding the Fourth Proportional to 218,519.37, 301,561.89 and 121,729.74

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Solution

The fourth proportional to 218,519.37, 301,561.89 and 121,729.74 is: 167,989.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,519.37 : 301,561.89 = 121,729.74 : x
  2. Step 2: Convert to fraction form
    218,519.37/301,561.89 = 121,729.74/x
  3. Step 3: Cross multiply
    218,519.37x = 301,561.89 × 121,729.74
  4. Step 4: Simplify right side
    218,519.37x = 36,709,048,876.27
  5. Step 5: Solve for x
    x = 36,709,048,876.27/218,519.37
  6. Step 6: Final answer
    x = 167,989.91

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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.