Home / 78,107.64-117,137.22-28,181.25

Finding the Fourth Proportional to 78,107.64, 117,137.22 and 28,181.25

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Solution

The fourth proportional to 78,107.64, 117,137.22 and 28,181.25 is: 42,263.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,107.64 : 117,137.22 = 28,181.25 : x
  2. Step 2: Convert to fraction form
    78,107.64/117,137.22 = 28,181.25/x
  3. Step 3: Cross multiply
    78,107.64x = 117,137.22 × 28,181.25
  4. Step 4: Simplify right side
    78,107.64x = 3,301,073,281.13
  5. Step 5: Solve for x
    x = 3,301,073,281.13/78,107.64
  6. Step 6: Final answer
    x = 42,263.13

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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.