Home / 78,272.30-117,380.55-28,339.49

Finding the Fourth Proportional to 78,272.30, 117,380.55 and 28,339.49

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Solution

The fourth proportional to 78,272.30, 117,380.55 and 28,339.49 is: 42,499.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,272.30 : 117,380.55 = 28,339.49 : x
  2. Step 2: Convert to fraction form
    78,272.30/117,380.55 = 28,339.49/x
  3. Step 3: Cross multiply
    78,272.30x = 117,380.55 × 28,339.49
  4. Step 4: Simplify right side
    78,272.30x = 3,326,504,922.92
  5. Step 5: Solve for x
    x = 3,326,504,922.92/78,272.30
  6. Step 6: Final answer
    x = 42,499.13

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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.