Home / 78,485,764.20-117,728,646.30-75,168,522.60

Finding the Fourth Proportional to 78,485,764.20, 117,728,646.30 and 75,168,522.60

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Solution

The fourth proportional to 78,485,764.20, 117,728,646.30 and 75,168,522.60 is: 112,752,783.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,485,764.20 : 117,728,646.30 = 75,168,522.60 : x
  2. Step 2: Convert to fraction form
    78,485,764.20/117,728,646.30 = 75,168,522.60/x
  3. Step 3: Cross multiply
    78,485,764.20x = 117,728,646.30 × 75,168,522.60
  4. Step 4: Simplify right side
    78,485,764.20x = 8,849,488,410,068,955
  5. Step 5: Solve for x
    x = 8,849,488,410,068,955/78,485,764.20
  6. Step 6: Final answer
    x = 112,752,783.90

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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.