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Finding the Fourth Proportional to 215,801.45, 323,749.60 and 66,053.30

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Solution

The fourth proportional to 215,801.45, 323,749.60 and 66,053.30 is: 99,094.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,801.45 : 323,749.60 = 66,053.30 : x
  2. Step 2: Convert to fraction form
    215,801.45/323,749.60 = 66,053.30/x
  3. Step 3: Cross multiply
    215,801.45x = 323,749.60 × 66,053.30
  4. Step 4: Simplify right side
    215,801.45x = 21,384,728,041.35
  5. Step 5: Solve for x
    x = 21,384,728,041.35/215,801.45
  6. Step 6: Final answer
    x = 99,094.46

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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.