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Finding the Fourth Proportional to 198,783.60, 298,175.40 and 74,108.40

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Solution

The fourth proportional to 198,783.60, 298,175.40 and 74,108.40 is: 111,162.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,783.60 : 298,175.40 = 74,108.40 : x
  2. Step 2: Convert to fraction form
    198,783.60/298,175.40 = 74,108.40/x
  3. Step 3: Cross multiply
    198,783.60x = 298,175.40 × 74,108.40
  4. Step 4: Simplify right side
    198,783.60x = 22,097,301,813.36
  5. Step 5: Solve for x
    x = 22,097,301,813.36/198,783.60
  6. Step 6: Final answer
    x = 111,162.60

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1.5x scale

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.