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Finding the Fourth Proportional to 216,501.30, 324,789.21 and 74,339.82

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Solution

The fourth proportional to 216,501.30, 324,789.21 and 74,339.82 is: 111,522.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,501.30 : 324,789.21 = 74,339.82 : x
  2. Step 2: Convert to fraction form
    216,501.30/324,789.21 = 74,339.82/x
  3. Step 3: Cross multiply
    216,501.30x = 324,789.21 × 74,339.82
  4. Step 4: Simplify right side
    216,501.30x = 24,144,771,409.34
  5. Step 5: Solve for x
    x = 24,144,771,409.34/216,501.30
  6. Step 6: Final answer
    x = 111,522.52

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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.