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Finding the Fourth Proportional to 121,069.87, 181,605.71 and 42,183.97

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Solution

The fourth proportional to 121,069.87, 181,605.71 and 42,183.97 is: 63,276.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,069.87 : 181,605.71 = 42,183.97 : x
  2. Step 2: Convert to fraction form
    121,069.87/181,605.71 = 42,183.97/x
  3. Step 3: Cross multiply
    121,069.87x = 181,605.71 × 42,183.97
  4. Step 4: Simplify right side
    121,069.87x = 7,660,849,473.91
  5. Step 5: Solve for x
    x = 7,660,849,473.91/121,069.87
  6. Step 6: Final answer
    x = 63,276.27

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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.