Home / 78,485,765.20-117,728,647.80-75,168,523.60

Finding the Fourth Proportional to 78,485,765.20, 117,728,647.80 and 75,168,523.60

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Solution

The fourth proportional to 78,485,765.20, 117,728,647.80 and 75,168,523.60 is: 112,752,785.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,485,765.20 : 117,728,647.80 = 75,168,523.60 : x
  2. Step 2: Convert to fraction form
    78,485,765.20/117,728,647.80 = 75,168,523.60/x
  3. Step 3: Cross multiply
    78,485,765.20x = 117,728,647.80 × 75,168,523.60
  4. Step 4: Simplify right side
    78,485,765.20x = 8,849,488,640,550,387
  5. Step 5: Solve for x
    x = 8,849,488,640,550,387/78,485,765.20
  6. Step 6: Final answer
    x = 112,752,785.40

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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.