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Finding the Fourth Proportional to 318,158.35, 439,053.79 and 172,959.31

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Solution

The fourth proportional to 318,158.35, 439,053.79 and 172,959.31 is: 238,681.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,158.35 : 439,053.79 = 172,959.31 : x
  2. Step 2: Convert to fraction form
    318,158.35/439,053.79 = 172,959.31/x
  3. Step 3: Cross multiply
    318,158.35x = 439,053.79 × 172,959.31
  4. Step 4: Simplify right side
    318,158.35x = 75,938,440,571.28
  5. Step 5: Solve for x
    x = 75,938,440,571.28/318,158.35
  6. Step 6: Final answer
    x = 238,681.27

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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.