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Finding the Fourth Proportional to 215,784.01, 323,662.44 and 66,012.40

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Solution

The fourth proportional to 215,784.01, 323,662.44 and 66,012.40 is: 99,014.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,784.01 : 323,662.44 = 66,012.40 : x
  2. Step 2: Convert to fraction form
    215,784.01/323,662.44 = 66,012.40/x
  3. Step 3: Cross multiply
    215,784.01x = 323,662.44 × 66,012.40
  4. Step 4: Simplify right side
    215,784.01x = 21,365,735,106.38
  5. Step 5: Solve for x
    x = 21,365,735,106.38/215,784.01
  6. Step 6: Final answer
    x = 99,014.45

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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.