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Finding the Fourth Proportional to 199,931.44, 299,912.61 and 66,812.16

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Solution

The fourth proportional to 199,931.44, 299,912.61 and 66,812.16 is: 100,223.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,931.44 : 299,912.61 = 66,812.16 : x
  2. Step 2: Convert to fraction form
    199,931.44/299,912.61 = 66,812.16/x
  3. Step 3: Cross multiply
    199,931.44x = 299,912.61 × 66,812.16
  4. Step 4: Simplify right side
    199,931.44x = 20,037,809,285.34
  5. Step 5: Solve for x
    x = 20,037,809,285.34/199,931.44
  6. Step 6: Final answer
    x = 100,223.40

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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.