Home / 135,705.29-203,876.05-128,036.72

Finding the Fourth Proportional to 135,705.29, 203,876.05 and 128,036.72

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Solution

The fourth proportional to 135,705.29, 203,876.05 and 128,036.72 is: 192,355.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,705.29 : 203,876.05 = 128,036.72 : x
  2. Step 2: Convert to fraction form
    135,705.29/203,876.05 = 128,036.72/x
  3. Step 3: Cross multiply
    135,705.29x = 203,876.05 × 128,036.72
  4. Step 4: Simplify right side
    135,705.29x = 26,103,620,393.69
  5. Step 5: Solve for x
    x = 26,103,620,393.69/135,705.29
  6. Step 6: Final answer
    x = 192,355.21

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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.