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Finding the Fourth Proportional to 76,694,539.80, 115,041,809.70 and 68,333,784.60

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Solution

The fourth proportional to 76,694,539.80, 115,041,809.70 and 68,333,784.60 is: 102,500,676.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,694,539.80 : 115,041,809.70 = 68,333,784.60 : x
  2. Step 2: Convert to fraction form
    76,694,539.80/115,041,809.70 = 68,333,784.60/x
  3. Step 3: Cross multiply
    76,694,539.80x = 115,041,809.70 × 68,333,784.60
  4. Step 4: Simplify right side
    76,694,539.80x = 7,861,242,244,033,990
  5. Step 5: Solve for x
    x = 7,861,242,244,033,990/76,694,539.80
  6. Step 6: Final answer
    x = 102,500,676.90

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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.