Home / 78,126.98-117,166.31-28,200.73

Finding the Fourth Proportional to 78,126.98, 117,166.31 and 28,200.73

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Solution

The fourth proportional to 78,126.98, 117,166.31 and 28,200.73 is: 42,292.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,126.98 : 117,166.31 = 28,200.73 : x
  2. Step 2: Convert to fraction form
    78,126.98/117,166.31 = 28,200.73/x
  3. Step 3: Cross multiply
    78,126.98x = 117,166.31 × 28,200.73
  4. Step 4: Simplify right side
    78,126.98x = 3,304,175,145.24
  5. Step 5: Solve for x
    x = 3,304,175,145.24/78,126.98
  6. Step 6: Final answer
    x = 42,292.37

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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.