Home / 78,087.24-117,132.30-28,171.08

Finding the Fourth Proportional to 78,087.24, 117,132.30 and 28,171.08

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Solution

The fourth proportional to 78,087.24, 117,132.30 and 28,171.08 is: 42,257.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,087.24 : 117,132.30 = 28,171.08 : x
  2. Step 2: Convert to fraction form
    78,087.24/117,132.30 = 28,171.08/x
  3. Step 3: Cross multiply
    78,087.24x = 117,132.30 × 28,171.08
  4. Step 4: Simplify right side
    78,087.24x = 3,299,743,393.88
  5. Step 5: Solve for x
    x = 3,299,743,393.88/78,087.24
  6. Step 6: Final answer
    x = 42,257.14

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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.