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Finding the Fourth Proportional to 200,398.77, 276,417.21 and 128,869.29

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Solution

The fourth proportional to 200,398.77, 276,417.21 and 128,869.29 is: 177,754.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,398.77 : 276,417.21 = 128,869.29 : x
  2. Step 2: Convert to fraction form
    200,398.77/276,417.21 = 128,869.29/x
  3. Step 3: Cross multiply
    200,398.77x = 276,417.21 × 128,869.29
  4. Step 4: Simplify right side
    200,398.77x = 35,621,689,596.48
  5. Step 5: Solve for x
    x = 35,621,689,596.48/200,398.77
  6. Step 6: Final answer
    x = 177,754.03

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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.