Home / 78,165.75-117,247.78-19,001.49

Finding the Fourth Proportional to 78,165.75, 117,247.78 and 19,001.49

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Solution

The fourth proportional to 78,165.75, 117,247.78 and 19,001.49 is: 28,502.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,165.75 : 117,247.78 = 19,001.49 : x
  2. Step 2: Convert to fraction form
    78,165.75/117,247.78 = 19,001.49/x
  3. Step 3: Cross multiply
    78,165.75x = 117,247.78 × 19,001.49
  4. Step 4: Simplify right side
    78,165.75x = 2,227,882,103.26
  5. Step 5: Solve for x
    x = 2,227,882,103.26/78,165.75
  6. Step 6: Final answer
    x = 28,502.02

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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.