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Finding the Fourth Proportional to 216,821.28, 299,192.28 and 126,189.24

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Solution

The fourth proportional to 216,821.28, 299,192.28 and 126,189.24 is: 174,128.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,821.28 : 299,192.28 = 126,189.24 : x
  2. Step 2: Convert to fraction form
    216,821.28/299,192.28 = 126,189.24/x
  3. Step 3: Cross multiply
    216,821.28x = 299,192.28 × 126,189.24
  4. Step 4: Simplify right side
    216,821.28x = 37,754,846,427.07
  5. Step 5: Solve for x
    x = 37,754,846,427.07/216,821.28
  6. Step 6: Final answer
    x = 174,128.88

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.