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Finding the Fourth Proportional to 215,750.75, 323,639.11 and 65,992.34

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Solution

The fourth proportional to 215,750.75, 323,639.11 and 65,992.34 is: 98,992.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,750.75 : 323,639.11 = 65,992.34 : x
  2. Step 2: Convert to fraction form
    215,750.75/323,639.11 = 65,992.34/x
  3. Step 3: Cross multiply
    215,750.75x = 323,639.11 × 65,992.34
  4. Step 4: Simplify right side
    215,750.75x = 21,357,702,828.53
  5. Step 5: Solve for x
    x = 21,357,702,828.53/215,750.75
  6. Step 6: Final answer
    x = 98,992.48

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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.