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Finding the Fourth Proportional to 198,599.60, 297,899.40 and 127,740.80

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Solution

The fourth proportional to 198,599.60, 297,899.40 and 127,740.80 is: 191,611.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,599.60 : 297,899.40 = 127,740.80 : x
  2. Step 2: Convert to fraction form
    198,599.60/297,899.40 = 127,740.80/x
  3. Step 3: Cross multiply
    198,599.60x = 297,899.40 × 127,740.80
  4. Step 4: Simplify right side
    198,599.60x = 38,053,907,675.52
  5. Step 5: Solve for x
    x = 38,053,907,675.52/198,599.60
  6. Step 6: Final answer
    x = 191,611.20

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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.