Home / 109,991.04-151,709.21-100,945.55

Finding the Fourth Proportional to 109,991.04, 151,709.21 and 100,945.55

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Solution

The fourth proportional to 109,991.04, 151,709.21 and 100,945.55 is: 139,232.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,991.04 : 151,709.21 = 100,945.55 : x
  2. Step 2: Convert to fraction form
    109,991.04/151,709.21 = 100,945.55/x
  3. Step 3: Cross multiply
    109,991.04x = 151,709.21 × 100,945.55
  4. Step 4: Simplify right side
    109,991.04x = 15,314,368,380.24
  5. Step 5: Solve for x
    x = 15,314,368,380.24/109,991.04
  6. Step 6: Final answer
    x = 139,232.87

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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.