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Finding the Fourth Proportional to 143,405.82, 197,912.70 and 79,756.02

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Solution

The fourth proportional to 143,405.82, 197,912.70 and 79,756.02 is: 110,070.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,405.82 : 197,912.70 = 79,756.02 : x
  2. Step 2: Convert to fraction form
    143,405.82/197,912.70 = 79,756.02/x
  3. Step 3: Cross multiply
    143,405.82x = 197,912.70 × 79,756.02
  4. Step 4: Simplify right side
    143,405.82x = 15,784,729,259.45
  5. Step 5: Solve for x
    x = 15,784,729,259.45/143,405.82
  6. Step 6: Final answer
    x = 110,070.35

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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.