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Finding the Fourth Proportional to 291,839.80, 437,759.70 and 81,477.40

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Solution

The fourth proportional to 291,839.80, 437,759.70 and 81,477.40 is: 122,216.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,839.80 : 437,759.70 = 81,477.40 : x
  2. Step 2: Convert to fraction form
    291,839.80/437,759.70 = 81,477.40/x
  3. Step 3: Cross multiply
    291,839.80x = 437,759.70 × 81,477.40
  4. Step 4: Simplify right side
    291,839.80x = 35,667,522,180.78
  5. Step 5: Solve for x
    x = 35,667,522,180.78/291,839.80
  6. Step 6: Final answer
    x = 122,216.10

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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.