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Finding the Fourth Proportional to 99,649,927.80, 149,474,891.70 and 90,562,286.70

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Solution

The fourth proportional to 99,649,927.80, 149,474,891.70 and 90,562,286.70 is: 135,843,430.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,649,927.80 : 149,474,891.70 = 90,562,286.70 : x
  2. Step 2: Convert to fraction form
    99,649,927.80/149,474,891.70 = 90,562,286.70/x
  3. Step 3: Cross multiply
    99,649,927.80x = 149,474,891.70 × 90,562,286.70
  4. Step 4: Simplify right side
    99,649,927.80x = 13,536,787,996,586,850
  5. Step 5: Solve for x
    x = 13,536,787,996,586,850/99,649,927.80
  6. Step 6: Final answer
    x = 135,843,430.05

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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.