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Finding the Fourth Proportional to 172,956.60, 258,965.91 and 89,675.64

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Solution

The fourth proportional to 172,956.60, 258,965.91 and 89,675.64 is: 134,270.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,956.60 : 258,965.91 = 89,675.64 : x
  2. Step 2: Convert to fraction form
    172,956.60/258,965.91 = 89,675.64/x
  3. Step 3: Cross multiply
    172,956.60x = 258,965.91 × 89,675.64
  4. Step 4: Simplify right side
    172,956.60x = 23,222,933,717.43
  5. Step 5: Solve for x
    x = 23,222,933,717.43/172,956.60
  6. Step 6: Final answer
    x = 134,270.30

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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.