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Finding the Fourth Proportional to 135,808.20, 203,712.30 and 128,032.20

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Solution

The fourth proportional to 135,808.20, 203,712.30 and 128,032.20 is: 192,048.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,808.20 : 203,712.30 = 128,032.20 : x
  2. Step 2: Convert to fraction form
    135,808.20/203,712.30 = 128,032.20/x
  3. Step 3: Cross multiply
    135,808.20x = 203,712.30 × 128,032.20
  4. Step 4: Simplify right side
    135,808.20x = 26,081,733,936.06
  5. Step 5: Solve for x
    x = 26,081,733,936.06/135,808.20
  6. Step 6: Final answer
    x = 192,048.30

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1.5x scale

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.