Home / 78,107.57-117,137.12-28,181.19

Finding the Fourth Proportional to 78,107.57, 117,137.12 and 28,181.19

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Solution

The fourth proportional to 78,107.57, 117,137.12 and 28,181.19 is: 42,263.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,107.57 : 117,137.12 = 28,181.19 : x
  2. Step 2: Convert to fraction form
    78,107.57/117,137.12 = 28,181.19/x
  3. Step 3: Cross multiply
    78,107.57x = 117,137.12 × 28,181.19
  4. Step 4: Simplify right side
    78,107.57x = 3,301,063,293.87
  5. Step 5: Solve for x
    x = 3,301,063,293.87/78,107.57
  6. Step 6: Final answer
    x = 42,263.04

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1.5x scale

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.