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Finding the Fourth Proportional to 100,969.35, 139,372.70 and 69,243.27

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Solution

The fourth proportional to 100,969.35, 139,372.70 and 69,243.27 is: 95,579.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,969.35 : 139,372.70 = 69,243.27 : x
  2. Step 2: Convert to fraction form
    100,969.35/139,372.70 = 69,243.27/x
  3. Step 3: Cross multiply
    100,969.35x = 139,372.70 × 69,243.27
  4. Step 4: Simplify right side
    100,969.35x = 9,650,621,150.51
  5. Step 5: Solve for x
    x = 9,650,621,150.51/100,969.35
  6. Step 6: Final answer
    x = 95,579.71

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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.