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Finding the Fourth Proportional to 235,603.44, 353,435.52 and 85,820.64

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Solution

The fourth proportional to 235,603.44, 353,435.52 and 85,820.64 is: 128,742.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,603.44 : 353,435.52 = 85,820.64 : x
  2. Step 2: Convert to fraction form
    235,603.44/353,435.52 = 85,820.64/x
  3. Step 3: Cross multiply
    235,603.44x = 353,435.52 × 85,820.64
  4. Step 4: Simplify right side
    235,603.44x = 30,332,062,525.13
  5. Step 5: Solve for x
    x = 30,332,062,525.13/235,603.44
  6. Step 6: Final answer
    x = 128,742.02

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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.