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Finding the Fourth Proportional to 100,993.85, 139,365.26 and 55,669.49

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Solution

The fourth proportional to 100,993.85, 139,365.26 and 55,669.49 is: 76,820.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,993.85 : 139,365.26 = 55,669.49 : x
  2. Step 2: Convert to fraction form
    100,993.85/139,365.26 = 55,669.49/x
  3. Step 3: Cross multiply
    100,993.85x = 139,365.26 × 55,669.49
  4. Step 4: Simplify right side
    100,993.85x = 7,758,393,488.05
  5. Step 5: Solve for x
    x = 7,758,393,488.05/100,993.85
  6. Step 6: Final answer
    x = 76,820.45

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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.