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Finding the Fourth Proportional to 200,578.35, 276,761.84 and 128,941.95

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Solution

The fourth proportional to 200,578.35, 276,761.84 and 128,941.95 is: 177,916.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,578.35 : 276,761.84 = 128,941.95 : x
  2. Step 2: Convert to fraction form
    200,578.35/276,761.84 = 128,941.95/x
  3. Step 3: Cross multiply
    200,578.35x = 276,761.84 × 128,941.95
  4. Step 4: Simplify right side
    200,578.35x = 35,686,210,690.48
  5. Step 5: Solve for x
    x = 35,686,210,690.48/200,578.35
  6. Step 6: Final answer
    x = 177,916.56

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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.