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Finding the Fourth Proportional to 199,604.40, 299,406.60 and 128,745.60

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Solution

The fourth proportional to 199,604.40, 299,406.60 and 128,745.60 is: 193,118.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,604.40 : 299,406.60 = 128,745.60 : x
  2. Step 2: Convert to fraction form
    199,604.40/299,406.60 = 128,745.60/x
  3. Step 3: Cross multiply
    199,604.40x = 299,406.60 × 128,745.60
  4. Step 4: Simplify right side
    199,604.40x = 38,547,282,360.96
  5. Step 5: Solve for x
    x = 38,547,282,360.96/199,604.40
  6. Step 6: Final answer
    x = 193,118.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.