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Finding the Fourth Proportional to 318,159.35, 439,055.17 and 172,960.31

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Solution

The fourth proportional to 318,159.35, 439,055.17 and 172,960.31 is: 238,682.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,159.35 : 439,055.17 = 172,960.31 : x
  2. Step 2: Convert to fraction form
    318,159.35/439,055.17 = 172,960.31/x
  3. Step 3: Cross multiply
    318,159.35x = 439,055.17 × 172,960.31
  4. Step 4: Simplify right side
    318,159.35x = 75,939,118,310.30
  5. Step 5: Solve for x
    x = 75,939,118,310.30/318,159.35
  6. Step 6: Final answer
    x = 238,682.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.