Home / 78,170.28-117,185.34-28,238.64

Finding the Fourth Proportional to 78,170.28, 117,185.34 and 28,238.64

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Solution

The fourth proportional to 78,170.28, 117,185.34 and 28,238.64 is: 42,332.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,170.28 : 117,185.34 = 28,238.64 : x
  2. Step 2: Convert to fraction form
    78,170.28/117,185.34 = 28,238.64/x
  3. Step 3: Cross multiply
    78,170.28x = 117,185.34 × 28,238.64
  4. Step 4: Simplify right side
    78,170.28x = 3,309,154,629.54
  5. Step 5: Solve for x
    x = 3,309,154,629.54/78,170.28
  6. Step 6: Final answer
    x = 42,332.64

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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.