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Finding the Fourth Proportional to 103,978.70, 155,676.45 and 101,062.70

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Solution

The fourth proportional to 103,978.70, 155,676.45 and 101,062.70 is: 151,310.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,978.70 : 155,676.45 = 101,062.70 : x
  2. Step 2: Convert to fraction form
    103,978.70/155,676.45 = 101,062.70/x
  3. Step 3: Cross multiply
    103,978.70x = 155,676.45 × 101,062.70
  4. Step 4: Simplify right side
    103,978.70x = 15,733,082,363.42
  5. Step 5: Solve for x
    x = 15,733,082,363.42/103,978.70
  6. Step 6: Final answer
    x = 151,310.63

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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.