Home / 78,620.10-117,930.15-47,127.30

Finding the Fourth Proportional to 78,620.10, 117,930.15 and 47,127.30

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Solution

The fourth proportional to 78,620.10, 117,930.15 and 47,127.30 is: 70,690.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,620.10 : 117,930.15 = 47,127.30 : x
  2. Step 2: Convert to fraction form
    78,620.10/117,930.15 = 47,127.30/x
  3. Step 3: Cross multiply
    78,620.10x = 117,930.15 × 47,127.30
  4. Step 4: Simplify right side
    78,620.10x = 5,557,729,558.10
  5. Step 5: Solve for x
    x = 5,557,729,558.10/78,620.10
  6. Step 6: Final answer
    x = 70,690.95

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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.