Home / 189,930.47-261,847.56-121,829.22

Finding the Fourth Proportional to 189,930.47, 261,847.56 and 121,829.22

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Solution

The fourth proportional to 189,930.47, 261,847.56 and 121,829.22 is: 167,959.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,930.47 : 261,847.56 = 121,829.22 : x
  2. Step 2: Convert to fraction form
    189,930.47/261,847.56 = 121,829.22/x
  3. Step 3: Cross multiply
    189,930.47x = 261,847.56 × 121,829.22
  4. Step 4: Simplify right side
    189,930.47x = 31,900,683,993.70
  5. Step 5: Solve for x
    x = 31,900,683,993.70/189,930.47
  6. Step 6: Final answer
    x = 167,959.80

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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.