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Finding the Fourth Proportional to 79,249.16, 118,872.54 and 19,278.20

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Solution

The fourth proportional to 79,249.16, 118,872.54 and 19,278.20 is: 28,917.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,249.16 : 118,872.54 = 19,278.20 : x
  2. Step 2: Convert to fraction form
    79,249.16/118,872.54 = 19,278.20/x
  3. Step 3: Cross multiply
    79,249.16x = 118,872.54 × 19,278.20
  4. Step 4: Simplify right side
    79,249.16x = 2,291,648,600.63
  5. Step 5: Solve for x
    x = 2,291,648,600.63/79,249.16
  6. Step 6: Final answer
    x = 28,917.01

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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.