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Finding the Fourth Proportional to 74,716.80, 112,075.20 and 43,180.80

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Solution

The fourth proportional to 74,716.80, 112,075.20 and 43,180.80 is: 64,771.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,716.80 : 112,075.20 = 43,180.80 : x
  2. Step 2: Convert to fraction form
    74,716.80/112,075.20 = 43,180.80/x
  3. Step 3: Cross multiply
    74,716.80x = 112,075.20 × 43,180.80
  4. Step 4: Simplify right side
    74,716.80x = 4,839,496,796.16
  5. Step 5: Solve for x
    x = 4,839,496,796.16/74,716.80
  6. Step 6: Final answer
    x = 64,771.20

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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.