Home / 258,516.85-387,689.17-108,729.22

Finding the Fourth Proportional to 258,516.85, 387,689.17 and 108,729.22

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Solution

The fourth proportional to 258,516.85, 387,689.17 and 108,729.22 is: 163,057.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,516.85 : 387,689.17 = 108,729.22 : x
  2. Step 2: Convert to fraction form
    258,516.85/387,689.17 = 108,729.22/x
  3. Step 3: Cross multiply
    258,516.85x = 387,689.17 × 108,729.22
  4. Step 4: Simplify right side
    258,516.85x = 42,153,141,056.55
  5. Step 5: Solve for x
    x = 42,153,141,056.55/258,516.85
  6. Step 6: Final answer
    x = 163,057.62

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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.