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Finding the Fourth Proportional to 143,967.94, 198,568.64 and 105,715.49

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Solution

The fourth proportional to 143,967.94, 198,568.64 and 105,715.49 is: 145,808.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,967.94 : 198,568.64 = 105,715.49 : x
  2. Step 2: Convert to fraction form
    143,967.94/198,568.64 = 105,715.49/x
  3. Step 3: Cross multiply
    143,967.94x = 198,568.64 × 105,715.49
  4. Step 4: Simplify right side
    143,967.94x = 20,991,780,347.68
  5. Step 5: Solve for x
    x = 20,991,780,347.68/143,967.94
  6. Step 6: Final answer
    x = 145,808.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.