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Finding the Fourth Proportional to 318,168.71, 439,074.27 and 172,975.91

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Solution

The fourth proportional to 318,168.71, 439,074.27 and 172,975.91 is: 238,707.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,168.71 : 439,074.27 = 172,975.91 : x
  2. Step 2: Convert to fraction form
    318,168.71/439,074.27 = 172,975.91/x
  3. Step 3: Cross multiply
    318,168.71x = 439,074.27 × 172,975.91
  4. Step 4: Simplify right side
    318,168.71x = 75,949,269,215.46
  5. Step 5: Solve for x
    x = 75,949,269,215.46/318,168.71
  6. Step 6: Final answer
    x = 238,707.54

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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.