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Finding the Fourth Proportional to 215,445, 323,173.26 and 73,290

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Solution

The fourth proportional to 215,445, 323,173.26 and 73,290 is: 109,936.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,445 : 323,173.26 = 73,290 : x
  2. Step 2: Convert to fraction form
    215,445/323,173.26 = 73,290/x
  3. Step 3: Cross multiply
    215,445x = 323,173.26 × 73,290
  4. Step 4: Simplify right side
    215,445x = 23,685,368,225.40
  5. Step 5: Solve for x
    x = 23,685,368,225.40/215,445
  6. Step 6: Final answer
    x = 109,936.96

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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.