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Finding the Fourth Proportional to 226,351.50, 312,370.90 and 128,226.68

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Solution

The fourth proportional to 226,351.50, 312,370.90 and 128,226.68 is: 176,956.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    226,351.50 : 312,370.90 = 128,226.68 : x
  2. Step 2: Convert to fraction form
    226,351.50/312,370.90 = 128,226.68/x
  3. Step 3: Cross multiply
    226,351.50x = 312,370.90 × 128,226.68
  4. Step 4: Simplify right side
    226,351.50x = 40,054,283,435.61
  5. Step 5: Solve for x
    x = 40,054,283,435.61/226,351.50
  6. Step 6: Final answer
    x = 176,956.12

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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.