Home / 198,019.20-297,028.80-127,977.60

Finding the Fourth Proportional to 198,019.20, 297,028.80 and 127,977.60

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Solution

The fourth proportional to 198,019.20, 297,028.80 and 127,977.60 is: 191,966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,019.20 : 297,028.80 = 127,977.60 : x
  2. Step 2: Convert to fraction form
    198,019.20/297,028.80 = 127,977.60/x
  3. Step 3: Cross multiply
    198,019.20x = 297,028.80 × 127,977.60
  4. Step 4: Simplify right side
    198,019.20x = 38,013,032,954.88
  5. Step 5: Solve for x
    x = 38,013,032,954.88/198,019.20
  6. Step 6: Final answer
    x = 191,966.40

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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.