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Finding the Fourth Proportional to 100,858.68, 139,183.84 and 55,535.72

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Solution

The fourth proportional to 100,858.68, 139,183.84 and 55,535.72 is: 76,638.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,858.68 : 139,183.84 = 55,535.72 : x
  2. Step 2: Convert to fraction form
    100,858.68/139,183.84 = 55,535.72/x
  3. Step 3: Cross multiply
    100,858.68x = 139,183.84 × 55,535.72
  4. Step 4: Simplify right side
    100,858.68x = 7,729,674,766.76
  5. Step 5: Solve for x
    x = 7,729,674,766.76/100,858.68
  6. Step 6: Final answer
    x = 76,638.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.