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Finding the Fourth Proportional to 255,391.63, 352,442.90 and 140,672.86

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Solution

The fourth proportional to 255,391.63, 352,442.90 and 140,672.86 is: 194,129.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,391.63 : 352,442.90 = 140,672.86 : x
  2. Step 2: Convert to fraction form
    255,391.63/352,442.90 = 140,672.86/x
  3. Step 3: Cross multiply
    255,391.63x = 352,442.90 × 140,672.86
  4. Step 4: Simplify right side
    255,391.63x = 49,579,150,729.69
  5. Step 5: Solve for x
    x = 49,579,150,729.69/255,391.63
  6. Step 6: Final answer
    x = 194,129.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.