Home / 198,947.28-298,333.36-105,431.12

Finding the Fourth Proportional to 198,947.28, 298,333.36 and 105,431.12

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Solution

The fourth proportional to 198,947.28, 298,333.36 and 105,431.12 is: 158,100.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,947.28 : 298,333.36 = 105,431.12 : x
  2. Step 2: Convert to fraction form
    198,947.28/298,333.36 = 105,431.12/x
  3. Step 3: Cross multiply
    198,947.28x = 298,333.36 × 105,431.12
  4. Step 4: Simplify right side
    198,947.28x = 31,453,620,278.16
  5. Step 5: Solve for x
    x = 31,453,620,278.16/198,947.28
  6. Step 6: Final answer
    x = 158,100.28

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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.