Home / 257,789.16-386,836.83-139,457.88

Finding the Fourth Proportional to 257,789.16, 386,836.83 and 139,457.88

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Solution

The fourth proportional to 257,789.16, 386,836.83 and 139,457.88 is: 209,269.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,789.16 : 386,836.83 = 139,457.88 : x
  2. Step 2: Convert to fraction form
    257,789.16/386,836.83 = 139,457.88/x
  3. Step 3: Cross multiply
    257,789.16x = 386,836.83 × 139,457.88
  4. Step 4: Simplify right side
    257,789.16x = 53,947,444,217.72
  5. Step 5: Solve for x
    x = 53,947,444,217.72/257,789.16
  6. Step 6: Final answer
    x = 209,269.64

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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.