Home / 257,909.58-387,014.94-108,138.42

Finding the Fourth Proportional to 257,909.58, 387,014.94 and 108,138.42

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Solution

The fourth proportional to 257,909.58, 387,014.94 and 108,138.42 is: 162,270.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,909.58 : 387,014.94 = 108,138.42 : x
  2. Step 2: Convert to fraction form
    257,909.58/387,014.94 = 108,138.42/x
  3. Step 3: Cross multiply
    257,909.58x = 387,014.94 × 108,138.42
  4. Step 4: Simplify right side
    257,909.58x = 41,851,184,127.99
  5. Step 5: Solve for x
    x = 41,851,184,127.99/257,909.58
  6. Step 6: Final answer
    x = 162,270.76

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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.