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Finding the Fourth Proportional to 198,772.40, 298,079.40 and 65,615.60

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Solution

The fourth proportional to 198,772.40, 298,079.40 and 65,615.60 is: 98,397.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,772.40 : 298,079.40 = 65,615.60 : x
  2. Step 2: Convert to fraction form
    198,772.40/298,079.40 = 65,615.60/x
  3. Step 3: Cross multiply
    198,772.40x = 298,079.40 × 65,615.60
  4. Step 4: Simplify right side
    198,772.40x = 19,558,658,678.64
  5. Step 5: Solve for x
    x = 19,558,658,678.64/198,772.40
  6. Step 6: Final answer
    x = 98,397.26

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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.