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Finding the Fourth Proportional to 215,762.11, 323,631.51 and 66,002.42

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Solution

The fourth proportional to 215,762.11, 323,631.51 and 66,002.42 is: 99,000.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,762.11 : 323,631.51 = 66,002.42 : x
  2. Step 2: Convert to fraction form
    215,762.11/323,631.51 = 66,002.42/x
  3. Step 3: Cross multiply
    215,762.11x = 323,631.51 × 66,002.42
  4. Step 4: Simplify right side
    215,762.11x = 21,360,461,230.10
  5. Step 5: Solve for x
    x = 21,360,461,230.10/215,762.11
  6. Step 6: Final answer
    x = 99,000.06

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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.