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Finding the Fourth Proportional to 90,760,499.10, 135,978,363.90 and 55,203,159.60

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Solution

The fourth proportional to 90,760,499.10, 135,978,363.90 and 55,203,159.60 is: 82,705,972.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,760,499.10 : 135,978,363.90 = 55,203,159.60 : x
  2. Step 2: Convert to fraction form
    90,760,499.10/135,978,363.90 = 55,203,159.60/x
  3. Step 3: Cross multiply
    90,760,499.10x = 135,978,363.90 × 55,203,159.60
  4. Step 4: Simplify right side
    90,760,499.10x = 7,506,435,324,518,579
  5. Step 5: Solve for x
    x = 7,506,435,324,518,579/90,760,499.10
  6. Step 6: Final answer
    x = 82,705,972.30

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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.