Home / 189,930.70-261,847.88-121,829.47

Finding the Fourth Proportional to 189,930.70, 261,847.88 and 121,829.47

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Solution

The fourth proportional to 189,930.70, 261,847.88 and 121,829.47 is: 167,960.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,930.70 : 261,847.88 = 121,829.47 : x
  2. Step 2: Convert to fraction form
    189,930.70/261,847.88 = 121,829.47/x
  3. Step 3: Cross multiply
    189,930.70x = 261,847.88 × 121,829.47
  4. Step 4: Simplify right side
    189,930.70x = 31,900,787,634.12
  5. Step 5: Solve for x
    x = 31,900,787,634.12/189,930.70
  6. Step 6: Final answer
    x = 167,960.14

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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.