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Finding the Fourth Proportional to 216,636, 324,923.92 and 66,881.22

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Solution

The fourth proportional to 216,636, 324,923.92 and 66,881.22 is: 100,312.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,636 : 324,923.92 = 66,881.22 : x
  2. Step 2: Convert to fraction form
    216,636/324,923.92 = 66,881.22/x
  3. Step 3: Cross multiply
    216,636x = 324,923.92 × 66,881.22
  4. Step 4: Simplify right side
    216,636x = 21,731,308,176.78
  5. Step 5: Solve for x
    x = 21,731,308,176.78/216,636
  6. Step 6: Final answer
    x = 100,312.54

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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.