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Finding the Fourth Proportional to 71,970.44, 107,955.50 and 19,379.97

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Solution

The fourth proportional to 71,970.44, 107,955.50 and 19,379.97 is: 29,069.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,970.44 : 107,955.50 = 19,379.97 : x
  2. Step 2: Convert to fraction form
    71,970.44/107,955.50 = 19,379.97/x
  3. Step 3: Cross multiply
    71,970.44x = 107,955.50 × 19,379.97
  4. Step 4: Simplify right side
    71,970.44x = 2,092,174,254.44
  5. Step 5: Solve for x
    x = 2,092,174,254.44/71,970.44
  6. Step 6: Final answer
    x = 29,069.91

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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.