Home / 258,429.12-387,644.34-80,951.64

Finding the Fourth Proportional to 258,429.12, 387,644.34 and 80,951.64

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Solution

The fourth proportional to 258,429.12, 387,644.34 and 80,951.64 is: 121,427.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,429.12 : 387,644.34 = 80,951.64 : x
  2. Step 2: Convert to fraction form
    258,429.12/387,644.34 = 80,951.64/x
  3. Step 3: Cross multiply
    258,429.12x = 387,644.34 × 80,951.64
  4. Step 4: Simplify right side
    258,429.12x = 31,380,445,059.72
  5. Step 5: Solve for x
    x = 31,380,445,059.72/258,429.12
  6. Step 6: Final answer
    x = 121,427.67

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1.5x scale

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.