Home / 305,712.05-458,419.94-128,171.39

Finding the Fourth Proportional to 305,712.05, 458,419.94 and 128,171.39

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Solution

The fourth proportional to 305,712.05, 458,419.94 and 128,171.39 is: 192,194.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,712.05 : 458,419.94 = 128,171.39 : x
  2. Step 2: Convert to fraction form
    305,712.05/458,419.94 = 128,171.39/x
  3. Step 3: Cross multiply
    305,712.05x = 458,419.94 × 128,171.39
  4. Step 4: Simplify right side
    305,712.05x = 58,756,318,461.20
  5. Step 5: Solve for x
    x = 58,756,318,461.20/305,712.05
  6. Step 6: Final answer
    x = 192,194.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.