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Finding the Fourth Proportional to 79,139.73, 118,705.34 and 19,975.91

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Solution

The fourth proportional to 79,139.73, 118,705.34 and 19,975.91 is: 29,962.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,139.73 : 118,705.34 = 19,975.91 : x
  2. Step 2: Convert to fraction form
    79,139.73/118,705.34 = 19,975.91/x
  3. Step 3: Cross multiply
    79,139.73x = 118,705.34 × 19,975.91
  4. Step 4: Simplify right side
    79,139.73x = 2,371,247,188.36
  5. Step 5: Solve for x
    x = 2,371,247,188.36/79,139.73
  6. Step 6: Final answer
    x = 29,962.79

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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.