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Finding the Fourth Proportional to 200,431.78, 276,619.18 and 115,551.88

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Solution

The fourth proportional to 200,431.78, 276,619.18 and 115,551.88 is: 159,475.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,431.78 : 276,619.18 = 115,551.88 : x
  2. Step 2: Convert to fraction form
    200,431.78/276,619.18 = 115,551.88/x
  3. Step 3: Cross multiply
    200,431.78x = 276,619.18 × 115,551.88
  4. Step 4: Simplify right side
    200,431.78x = 31,963,866,293.06
  5. Step 5: Solve for x
    x = 31,963,866,293.06/200,431.78
  6. Step 6: Final answer
    x = 159,475.04

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Why These Related Problems?

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