Home / 257,917.48-386,699.76-131,312.76

Finding the Fourth Proportional to 257,917.48, 386,699.76 and 131,312.76

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Solution

The fourth proportional to 257,917.48, 386,699.76 and 131,312.76 is: 196,879.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,917.48 : 386,699.76 = 131,312.76 : x
  2. Step 2: Convert to fraction form
    257,917.48/386,699.76 = 131,312.76/x
  3. Step 3: Cross multiply
    257,917.48x = 386,699.76 × 131,312.76
  4. Step 4: Simplify right side
    257,917.48x = 50,778,612,776.94
  5. Step 5: Solve for x
    x = 50,778,612,776.94/257,917.48
  6. Step 6: Final answer
    x = 196,879.30

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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.