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Finding the Fourth Proportional to 154,590.72, 213,334.72 and 85,684.56

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Solution

The fourth proportional to 154,590.72, 213,334.72 and 85,684.56 is: 118,244.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,590.72 : 213,334.72 = 85,684.56 : x
  2. Step 2: Convert to fraction form
    154,590.72/213,334.72 = 85,684.56/x
  3. Step 3: Cross multiply
    154,590.72x = 213,334.72 × 85,684.56
  4. Step 4: Simplify right side
    154,590.72x = 18,279,491,615.92
  5. Step 5: Solve for x
    x = 18,279,491,615.92/154,590.72
  6. Step 6: Final answer
    x = 118,244.43

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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.