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Finding the Fourth Proportional to 79,140.94, 118,710.95 and 19,976.36

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Solution

The fourth proportional to 79,140.94, 118,710.95 and 19,976.36 is: 29,964.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,140.94 : 118,710.95 = 19,976.36 : x
  2. Step 2: Convert to fraction form
    79,140.94/118,710.95 = 19,976.36/x
  3. Step 3: Cross multiply
    79,140.94x = 118,710.95 × 19,976.36
  4. Step 4: Simplify right side
    79,140.94x = 2,371,412,673.14
  5. Step 5: Solve for x
    x = 2,371,412,673.14/79,140.94
  6. Step 6: Final answer
    x = 29,964.42

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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.