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Finding the Fourth Proportional to 109,038.72, 150,741.78 and 108,040.80

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Solution

The fourth proportional to 109,038.72, 150,741.78 and 108,040.80 is: 149,362.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,038.72 : 150,741.78 = 108,040.80 : x
  2. Step 2: Convert to fraction form
    109,038.72/150,741.78 = 108,040.80/x
  3. Step 3: Cross multiply
    109,038.72x = 150,741.78 × 108,040.80
  4. Step 4: Simplify right side
    109,038.72x = 16,286,262,504.62
  5. Step 5: Solve for x
    x = 16,286,262,504.62/109,038.72
  6. Step 6: Final answer
    x = 149,362.19

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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.