Home / 203,749.08-305,742.60-85,411.32

Finding the Fourth Proportional to 203,749.08, 305,742.60 and 85,411.32

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Solution

The fourth proportional to 203,749.08, 305,742.60 and 85,411.32 is: 128,166.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,749.08 : 305,742.60 = 85,411.32 : x
  2. Step 2: Convert to fraction form
    203,749.08/305,742.60 = 85,411.32/x
  3. Step 3: Cross multiply
    203,749.08x = 305,742.60 × 85,411.32
  4. Step 4: Simplify right side
    203,749.08x = 26,113,879,046.23
  5. Step 5: Solve for x
    x = 26,113,879,046.23/203,749.08
  6. Step 6: Final answer
    x = 128,166.86

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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.