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Finding the Fourth Proportional to 121,985,293.60, 182,809,978.80 and 80,928,013.60

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Solution

The fourth proportional to 121,985,293.60, 182,809,978.80 and 80,928,013.60 is: 121,280,590.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,985,293.60 : 182,809,978.80 = 80,928,013.60 : x
  2. Step 2: Convert to fraction form
    121,985,293.60/182,809,978.80 = 80,928,013.60/x
  3. Step 3: Cross multiply
    121,985,293.60x = 182,809,978.80 × 80,928,013.60
  4. Step 4: Simplify right side
    121,985,293.60x = 14,794,448,450,542,112
  5. Step 5: Solve for x
    x = 14,794,448,450,542,112/121,985,293.60
  6. Step 6: Final answer
    x = 121,280,590.59

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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.