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Finding the Fourth Proportional to 198,810.72, 298,402.92 and 104,108.87

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Solution

The fourth proportional to 198,810.72, 298,402.92 and 104,108.87 is: 156,261.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,810.72 : 298,402.92 = 104,108.87 : x
  2. Step 2: Convert to fraction form
    198,810.72/298,402.92 = 104,108.87/x
  3. Step 3: Cross multiply
    198,810.72x = 298,402.92 × 104,108.87
  4. Step 4: Simplify right side
    198,810.72x = 31,066,391,551.91
  5. Step 5: Solve for x
    x = 31,066,391,551.91/198,810.72
  6. Step 6: Final answer
    x = 156,261.15

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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.