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Finding the Fourth Proportional to 79,464.40, 119,261.40 and 76,872.40

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Solution

The fourth proportional to 79,464.40, 119,261.40 and 76,872.40 is: 115,371.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,464.40 : 119,261.40 = 76,872.40 : x
  2. Step 2: Convert to fraction form
    79,464.40/119,261.40 = 76,872.40/x
  3. Step 3: Cross multiply
    79,464.40x = 119,261.40 × 76,872.40
  4. Step 4: Simplify right side
    79,464.40x = 9,167,910,045.36
  5. Step 5: Solve for x
    x = 9,167,910,045.36/79,464.40
  6. Step 6: Final answer
    x = 115,371.29

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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.