Home / 143,806.16-198,447-80,140.88

Finding the Fourth Proportional to 143,806.16, 198,447 and 80,140.88

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Solution

The fourth proportional to 143,806.16, 198,447 and 80,140.88 is: 110,591.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,806.16 : 198,447 = 80,140.88 : x
  2. Step 2: Convert to fraction form
    143,806.16/198,447 = 80,140.88/x
  3. Step 3: Cross multiply
    143,806.16x = 198,447 × 80,140.88
  4. Step 4: Simplify right side
    143,806.16x = 15,903,717,213.36
  5. Step 5: Solve for x
    x = 15,903,717,213.36/143,806.16
  6. Step 6: Final answer
    x = 110,591.35

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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.