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Finding the Fourth Proportional to 99,649,907.80, 149,474,861.70 and 73,821,875.20

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Solution

The fourth proportional to 99,649,907.80, 149,474,861.70 and 73,821,875.20 is: 110,732,812.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,649,907.80 : 149,474,861.70 = 73,821,875.20 : x
  2. Step 2: Convert to fraction form
    99,649,907.80/149,474,861.70 = 73,821,875.20/x
  3. Step 3: Cross multiply
    99,649,907.80x = 149,474,861.70 × 73,821,875.20
  4. Step 4: Simplify right side
    99,649,907.80x = 11,034,514,585,954,660
  5. Step 5: Solve for x
    x = 11,034,514,585,954,660/99,649,907.80
  6. Step 6: Final answer
    x = 110,732,812.80

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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.