Home / 78,361,229.80-117,541,844.70-20,859,313.60

Finding the Fourth Proportional to 78,361,229.80, 117,541,844.70 and 20,859,313.60

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Solution

The fourth proportional to 78,361,229.80, 117,541,844.70 and 20,859,313.60 is: 31,288,970.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,361,229.80 : 117,541,844.70 = 20,859,313.60 : x
  2. Step 2: Convert to fraction form
    78,361,229.80/117,541,844.70 = 20,859,313.60/x
  3. Step 3: Cross multiply
    78,361,229.80x = 117,541,844.70 × 20,859,313.60
  4. Step 4: Simplify right side
    78,361,229.80x = 2,451,842,199,719,798
  5. Step 5: Solve for x
    x = 2,451,842,199,719,798/78,361,229.80
  6. Step 6: Final answer
    x = 31,288,970.40

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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.