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Finding the Fourth Proportional to 107,914.40, 161,698.80 and 68,400.80

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Solution

The fourth proportional to 107,914.40, 161,698.80 and 68,400.80 is: 102,491.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,914.40 : 161,698.80 = 68,400.80 : x
  2. Step 2: Convert to fraction form
    107,914.40/161,698.80 = 68,400.80/x
  3. Step 3: Cross multiply
    107,914.40x = 161,698.80 × 68,400.80
  4. Step 4: Simplify right side
    107,914.40x = 11,060,327,279.04
  5. Step 5: Solve for x
    x = 11,060,327,279.04/107,914.40
  6. Step 6: Final answer
    x = 102,491.67

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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.