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Finding the Fourth Proportional to 215,811.70, 323,705.61 and 66,051.88

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Solution

The fourth proportional to 215,811.70, 323,705.61 and 66,051.88 is: 99,074.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,811.70 : 323,705.61 = 66,051.88 : x
  2. Step 2: Convert to fraction form
    215,811.70/323,705.61 = 66,051.88/x
  3. Step 3: Cross multiply
    215,811.70x = 323,705.61 × 66,051.88
  4. Step 4: Simplify right side
    215,811.70x = 21,381,364,107.05
  5. Step 5: Solve for x
    x = 21,381,364,107.05/215,811.70
  6. Step 6: Final answer
    x = 99,074.17

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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.