Home / 78,080.40-117,107.32-28,150.56

Finding the Fourth Proportional to 78,080.40, 117,107.32 and 28,150.56

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Solution

The fourth proportional to 78,080.40, 117,107.32 and 28,150.56 is: 42,221.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,080.40 : 117,107.32 = 28,150.56 : x
  2. Step 2: Convert to fraction form
    78,080.40/117,107.32 = 28,150.56/x
  3. Step 3: Cross multiply
    78,080.40x = 117,107.32 × 28,150.56
  4. Step 4: Simplify right side
    78,080.40x = 3,296,636,638.10
  5. Step 5: Solve for x
    x = 3,296,636,638.10/78,080.40
  6. Step 6: Final answer
    x = 42,221.05

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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.