Home / 203,623.40-305,435.10-128,499.95

Finding the Fourth Proportional to 203,623.40, 305,435.10 and 128,499.95

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Solution

The fourth proportional to 203,623.40, 305,435.10 and 128,499.95 is: 192,749.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,623.40 : 305,435.10 = 128,499.95 : x
  2. Step 2: Convert to fraction form
    203,623.40/305,435.10 = 128,499.95/x
  3. Step 3: Cross multiply
    203,623.40x = 305,435.10 × 128,499.95
  4. Step 4: Simplify right side
    203,623.40x = 39,248,395,078.25
  5. Step 5: Solve for x
    x = 39,248,395,078.25/203,623.40
  6. Step 6: Final answer
    x = 192,749.93

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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.