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Finding the Fourth Proportional to 230,910.72, 346,385.74 and 81,138.08

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Solution

The fourth proportional to 230,910.72, 346,385.74 and 81,138.08 is: 121,714.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,910.72 : 346,385.74 = 81,138.08 : x
  2. Step 2: Convert to fraction form
    230,910.72/346,385.74 = 81,138.08/x
  3. Step 3: Cross multiply
    230,910.72x = 346,385.74 × 81,138.08
  4. Step 4: Simplify right side
    230,910.72x = 28,105,073,882.98
  5. Step 5: Solve for x
    x = 28,105,073,882.98/230,910.72
  6. Step 6: Final answer
    x = 121,714.03

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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.