Home / 78,414,905.80-117,622,358.70-74,887,712.20

Finding the Fourth Proportional to 78,414,905.80, 117,622,358.70 and 74,887,712.20

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Solution

The fourth proportional to 78,414,905.80, 117,622,358.70 and 74,887,712.20 is: 112,331,568.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,414,905.80 : 117,622,358.70 = 74,887,712.20 : x
  2. Step 2: Convert to fraction form
    78,414,905.80/117,622,358.70 = 74,887,712.20/x
  3. Step 3: Cross multiply
    78,414,905.80x = 117,622,358.70 × 74,887,712.20
  4. Step 4: Simplify right side
    78,414,905.80x = 8,808,469,346,610,767
  5. Step 5: Solve for x
    x = 8,808,469,346,610,767/78,414,905.80
  6. Step 6: Final answer
    x = 112,331,568.30

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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.