Home / 78,451.58-117,640.38-28,496.44

Finding the Fourth Proportional to 78,451.58, 117,640.38 and 28,496.44

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Solution

The fourth proportional to 78,451.58, 117,640.38 and 28,496.44 is: 42,731.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,451.58 : 117,640.38 = 28,496.44 : x
  2. Step 2: Convert to fraction form
    78,451.58/117,640.38 = 28,496.44/x
  3. Step 3: Cross multiply
    78,451.58x = 117,640.38 × 28,496.44
  4. Step 4: Simplify right side
    78,451.58x = 3,352,332,030.25
  5. Step 5: Solve for x
    x = 3,352,332,030.25/78,451.58
  6. Step 6: Final answer
    x = 42,731.22

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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.