Home / 428,745.08-643,117.62-148,109.24

Finding the Fourth Proportional to 428,745.08, 643,117.62 and 148,109.24

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Solution

The fourth proportional to 428,745.08, 643,117.62 and 148,109.24 is: 222,163.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,745.08 : 643,117.62 = 148,109.24 : x
  2. Step 2: Convert to fraction form
    428,745.08/643,117.62 = 148,109.24/x
  3. Step 3: Cross multiply
    428,745.08x = 643,117.62 × 148,109.24
  4. Step 4: Simplify right side
    428,745.08x = 95,251,661,928.81
  5. Step 5: Solve for x
    x = 95,251,661,928.81/428,745.08
  6. Step 6: Final answer
    x = 222,163.86

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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.