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Finding the Fourth Proportional to 72,907.80, 109,361.70 and 49,579.80

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Solution

The fourth proportional to 72,907.80, 109,361.70 and 49,579.80 is: 74,369.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,907.80 : 109,361.70 = 49,579.80 : x
  2. Step 2: Convert to fraction form
    72,907.80/109,361.70 = 49,579.80/x
  3. Step 3: Cross multiply
    72,907.80x = 109,361.70 × 49,579.80
  4. Step 4: Simplify right side
    72,907.80x = 5,422,131,213.66
  5. Step 5: Solve for x
    x = 5,422,131,213.66/72,907.80
  6. Step 6: Final answer
    x = 74,369.70

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1.5x scale

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.