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Finding the Fourth Proportional to 198,615.60, 298,038.60 and 73,969.20

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Solution

The fourth proportional to 198,615.60, 298,038.60 and 73,969.20 is: 110,996.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,615.60 : 298,038.60 = 73,969.20 : x
  2. Step 2: Convert to fraction form
    198,615.60/298,038.60 = 73,969.20/x
  3. Step 3: Cross multiply
    198,615.60x = 298,038.60 × 73,969.20
  4. Step 4: Simplify right side
    198,615.60x = 22,045,676,811.12
  5. Step 5: Solve for x
    x = 22,045,676,811.12/198,615.60
  6. Step 6: Final answer
    x = 110,996.70

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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.