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Finding the Fourth Proportional to 100,858.39, 139,183.45 and 55,535.45

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Solution

The fourth proportional to 100,858.39, 139,183.45 and 55,535.45 is: 76,638.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,858.39 : 139,183.45 = 55,535.45 : x
  2. Step 2: Convert to fraction form
    100,858.39/139,183.45 = 55,535.45/x
  3. Step 3: Cross multiply
    100,858.39x = 139,183.45 × 55,535.45
  4. Step 4: Simplify right side
    100,858.39x = 7,729,614,693.55
  5. Step 5: Solve for x
    x = 7,729,614,693.55/100,858.39
  6. Step 6: Final answer
    x = 76,638.29

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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.