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Finding the Fourth Proportional to 279,633.15, 419,671.16 and 121,972.32

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Solution

The fourth proportional to 279,633.15, 419,671.16 and 121,972.32 is: 183,055.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,633.15 : 419,671.16 = 121,972.32 : x
  2. Step 2: Convert to fraction form
    279,633.15/419,671.16 = 121,972.32/x
  3. Step 3: Cross multiply
    279,633.15x = 419,671.16 × 121,972.32
  4. Step 4: Simplify right side
    279,633.15x = 51,188,264,412.43
  5. Step 5: Solve for x
    x = 51,188,264,412.43/279,633.15
  6. Step 6: Final answer
    x = 183,055.06

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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.