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Finding the Fourth Proportional to 102,553.89, 153,847.10 and 43,390

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Solution

The fourth proportional to 102,553.89, 153,847.10 and 43,390 is: 65,091.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,553.89 : 153,847.10 = 43,390 : x
  2. Step 2: Convert to fraction form
    102,553.89/153,847.10 = 43,390/x
  3. Step 3: Cross multiply
    102,553.89x = 153,847.10 × 43,390
  4. Step 4: Simplify right side
    102,553.89x = 6,675,425,669
  5. Step 5: Solve for x
    x = 6,675,425,669/102,553.89
  6. Step 6: Final answer
    x = 65,091.88

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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.