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Finding the Fourth Proportional to 136,043.20, 204,064.80 and 128,826.10

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Solution

The fourth proportional to 136,043.20, 204,064.80 and 128,826.10 is: 193,239.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,043.20 : 204,064.80 = 128,826.10 : x
  2. Step 2: Convert to fraction form
    136,043.20/204,064.80 = 128,826.10/x
  3. Step 3: Cross multiply
    136,043.20x = 204,064.80 × 128,826.10
  4. Step 4: Simplify right side
    136,043.20x = 26,288,872,331.28
  5. Step 5: Solve for x
    x = 26,288,872,331.28/136,043.20
  6. Step 6: Final answer
    x = 193,239.15

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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.