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Finding the Fourth Proportional to 198,998.50, 298,500.06 and 85,130.82

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Solution

The fourth proportional to 198,998.50, 298,500.06 and 85,130.82 is: 127,697.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,998.50 : 298,500.06 = 85,130.82 : x
  2. Step 2: Convert to fraction form
    198,998.50/298,500.06 = 85,130.82/x
  3. Step 3: Cross multiply
    198,998.50x = 298,500.06 × 85,130.82
  4. Step 4: Simplify right side
    198,998.50x = 25,411,554,877.85
  5. Step 5: Solve for x
    x = 25,411,554,877.85/198,998.50
  6. Step 6: Final answer
    x = 127,697.22

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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.