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Finding the Fourth Proportional to 103,489.70, 155,234.55 and 75,605.45

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Solution

The fourth proportional to 103,489.70, 155,234.55 and 75,605.45 is: 113,408.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,489.70 : 155,234.55 = 75,605.45 : x
  2. Step 2: Convert to fraction form
    103,489.70/155,234.55 = 75,605.45/x
  3. Step 3: Cross multiply
    103,489.70x = 155,234.55 × 75,605.45
  4. Step 4: Simplify right side
    103,489.70x = 11,736,578,008.30
  5. Step 5: Solve for x
    x = 11,736,578,008.30/103,489.70
  6. Step 6: Final answer
    x = 113,408.18

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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.