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Finding the Fourth Proportional to 319,375.90, 479,063.91 and 129,939.34

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Solution

The fourth proportional to 319,375.90, 479,063.91 and 129,939.34 is: 194,909.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,375.90 : 479,063.91 = 129,939.34 : x
  2. Step 2: Convert to fraction form
    319,375.90/479,063.91 = 129,939.34/x
  3. Step 3: Cross multiply
    319,375.90x = 479,063.91 × 129,939.34
  4. Step 4: Simplify right side
    319,375.90x = 62,249,248,283.22
  5. Step 5: Solve for x
    x = 62,249,248,283.22/319,375.90
  6. Step 6: Final answer
    x = 194,909.03

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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.