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Finding the Fourth Proportional to 198,988.40, 298,045.20 and 119,964.80

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Solution

The fourth proportional to 198,988.40, 298,045.20 and 119,964.80 is: 179,683.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,988.40 : 298,045.20 = 119,964.80 : x
  2. Step 2: Convert to fraction form
    198,988.40/298,045.20 = 119,964.80/x
  3. Step 3: Cross multiply
    198,988.40x = 298,045.20 × 119,964.80
  4. Step 4: Simplify right side
    198,988.40x = 35,754,932,808.96
  5. Step 5: Solve for x
    x = 35,754,932,808.96/198,988.40
  6. Step 6: Final answer
    x = 179,683.50

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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.