Home / 258,318.28-386,755.62-139,564.12

Finding the Fourth Proportional to 258,318.28, 386,755.62 and 139,564.12

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Solution

The fourth proportional to 258,318.28, 386,755.62 and 139,564.12 is: 208,956.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,318.28 : 386,755.62 = 139,564.12 : x
  2. Step 2: Convert to fraction form
    258,318.28/386,755.62 = 139,564.12/x
  3. Step 3: Cross multiply
    258,318.28x = 386,755.62 × 139,564.12
  4. Step 4: Simplify right side
    258,318.28x = 53,977,207,760.35
  5. Step 5: Solve for x
    x = 53,977,207,760.35/258,318.28
  6. Step 6: Final answer
    x = 208,956.21

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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.