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Finding the Fourth Proportional to 216,333.69, 324,531.28 and 66,586.46

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Solution

The fourth proportional to 216,333.69, 324,531.28 and 66,586.46 is: 99,889.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,333.69 : 324,531.28 = 66,586.46 : x
  2. Step 2: Convert to fraction form
    216,333.69/324,531.28 = 66,586.46/x
  3. Step 3: Cross multiply
    216,333.69x = 324,531.28 × 66,586.46
  4. Step 4: Simplify right side
    216,333.69x = 21,609,387,471.81
  5. Step 5: Solve for x
    x = 21,609,387,471.81/216,333.69
  6. Step 6: Final answer
    x = 99,889.15

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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.