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Finding the Fourth Proportional to 253,218,043.08, 379,819,978.74 and 80,705,208.60

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Solution

The fourth proportional to 253,218,043.08, 379,819,978.74 and 80,705,208.60 is: 121,055,554.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,218,043.08 : 379,819,978.74 = 80,705,208.60 : x
  2. Step 2: Convert to fraction form
    253,218,043.08/379,819,978.74 = 80,705,208.60/x
  3. Step 3: Cross multiply
    253,218,043.08x = 379,819,978.74 × 80,705,208.60
  4. Step 4: Simplify right side
    253,218,043.08x = 30,653,450,614,659,264
  5. Step 5: Solve for x
    x = 30,653,450,614,659,264/253,218,043.08
  6. Step 6: Final answer
    x = 121,055,554.50

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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.