Home / 213,003,138.60-319,536,638.10-90,181,218.60

Finding the Fourth Proportional to 213,003,138.60, 319,536,638.10 and 90,181,218.60

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Solution

The fourth proportional to 213,003,138.60, 319,536,638.10 and 90,181,218.60 is: 135,285,346.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,003,138.60 : 319,536,638.10 = 90,181,218.60 : x
  2. Step 2: Convert to fraction form
    213,003,138.60/319,536,638.10 = 90,181,218.60/x
  3. Step 3: Cross multiply
    213,003,138.60x = 319,536,638.10 × 90,181,218.60
  4. Step 4: Simplify right side
    213,003,138.60x = 28,816,203,411,205,188
  5. Step 5: Solve for x
    x = 28,816,203,411,205,188/213,003,138.60
  6. Step 6: Final answer
    x = 135,285,346.50

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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.