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Finding the Fourth Proportional to 45,208.81, 67,805.48 and 11,929.22

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Solution

The fourth proportional to 45,208.81, 67,805.48 and 11,929.22 is: 17,891.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,208.81 : 67,805.48 = 11,929.22 : x
  2. Step 2: Convert to fraction form
    45,208.81/67,805.48 = 11,929.22/x
  3. Step 3: Cross multiply
    45,208.81x = 67,805.48 × 11,929.22
  4. Step 4: Simplify right side
    45,208.81x = 808,866,428.48
  5. Step 5: Solve for x
    x = 808,866,428.48/45,208.81
  6. Step 6: Final answer
    x = 17,891.79

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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.