Home / 78,205.08-117,279-28,273.20

Finding the Fourth Proportional to 78,205.08, 117,279 and 28,273.20

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Solution

The fourth proportional to 78,205.08, 117,279 and 28,273.20 is: 42,399.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,205.08 : 117,279 = 28,273.20 : x
  2. Step 2: Convert to fraction form
    78,205.08/117,279 = 28,273.20/x
  3. Step 3: Cross multiply
    78,205.08x = 117,279 × 28,273.20
  4. Step 4: Simplify right side
    78,205.08x = 3,315,852,622.80
  5. Step 5: Solve for x
    x = 3,315,852,622.80/78,205.08
  6. Step 6: Final answer
    x = 42,399.45

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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.