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Finding the Fourth Proportional to 99,809,728.90, 149,688,021.30 and 30,722,398.90

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Solution

The fourth proportional to 99,809,728.90, 149,688,021.30 and 30,722,398.90 is: 46,075,419.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,809,728.90 : 149,688,021.30 = 30,722,398.90 : x
  2. Step 2: Convert to fraction form
    99,809,728.90/149,688,021.30 = 30,722,398.90/x
  3. Step 3: Cross multiply
    99,809,728.90x = 149,688,021.30 × 30,722,398.90
  4. Step 4: Simplify right side
    99,809,728.90x = 4,598,775,100,930,297
  5. Step 5: Solve for x
    x = 4,598,775,100,930,297/99,809,728.90
  6. Step 6: Final answer
    x = 46,075,419.22

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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.