Home / 198,820.84-298,139.10-74,128.36

Finding the Fourth Proportional to 198,820.84, 298,139.10 and 74,128.36

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Solution

The fourth proportional to 198,820.84, 298,139.10 and 74,128.36 is: 111,158.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,820.84 : 298,139.10 = 74,128.36 : x
  2. Step 2: Convert to fraction form
    198,820.84/298,139.10 = 74,128.36/x
  3. Step 3: Cross multiply
    198,820.84x = 298,139.10 × 74,128.36
  4. Step 4: Simplify right side
    198,820.84x = 22,100,562,534.88
  5. Step 5: Solve for x
    x = 22,100,562,534.88/198,820.84
  6. Step 6: Final answer
    x = 111,158.18

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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.