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Finding the Fourth Proportional to 216,461.43, 324,694.62 and 66,700.53

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Solution

The fourth proportional to 216,461.43, 324,694.62 and 66,700.53 is: 100,051.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,461.43 : 324,694.62 = 66,700.53 : x
  2. Step 2: Convert to fraction form
    216,461.43/324,694.62 = 66,700.53/x
  3. Step 3: Cross multiply
    216,461.43x = 324,694.62 × 66,700.53
  4. Step 4: Simplify right side
    216,461.43x = 21,657,303,242.15
  5. Step 5: Solve for x
    x = 21,657,303,242.15/216,461.43
  6. Step 6: Final answer
    x = 100,051.56

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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.