Home / 198,940.64-298,301.90-78,875.96

Finding the Fourth Proportional to 198,940.64, 298,301.90 and 78,875.96

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Solution

The fourth proportional to 198,940.64, 298,301.90 and 78,875.96 is: 118,270.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,940.64 : 298,301.90 = 78,875.96 : x
  2. Step 2: Convert to fraction form
    198,940.64/298,301.90 = 78,875.96/x
  3. Step 3: Cross multiply
    198,940.64x = 298,301.90 × 78,875.96
  4. Step 4: Simplify right side
    198,940.64x = 23,528,848,732.32
  5. Step 5: Solve for x
    x = 23,528,848,732.32/198,940.64
  6. Step 6: Final answer
    x = 118,270.70

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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.