Home / 78,137.54-117,208.04-54,098.16

Finding the Fourth Proportional to 78,137.54, 117,208.04 and 54,098.16

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Solution

The fourth proportional to 78,137.54, 117,208.04 and 54,098.16 is: 81,148.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,137.54 : 117,208.04 = 54,098.16 : x
  2. Step 2: Convert to fraction form
    78,137.54/117,208.04 = 54,098.16/x
  3. Step 3: Cross multiply
    78,137.54x = 117,208.04 × 54,098.16
  4. Step 4: Simplify right side
    78,137.54x = 6,340,739,436.45
  5. Step 5: Solve for x
    x = 6,340,739,436.45/78,137.54
  6. Step 6: Final answer
    x = 81,148.44

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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.