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Finding the Fourth Proportional to 80,642,628.80, 120,963,943.20 and 29,507,652.80

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Solution

The fourth proportional to 80,642,628.80, 120,963,943.20 and 29,507,652.80 is: 44,261,479.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,642,628.80 : 120,963,943.20 = 29,507,652.80 : x
  2. Step 2: Convert to fraction form
    80,642,628.80/120,963,943.20 = 29,507,652.80/x
  3. Step 3: Cross multiply
    80,642,628.80x = 120,963,943.20 × 29,507,652.80
  4. Step 4: Simplify right side
    80,642,628.80x = 3,569,362,037,264,521
  5. Step 5: Solve for x
    x = 3,569,362,037,264,521/80,642,628.80
  6. Step 6: Final answer
    x = 44,261,479.20

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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.