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Finding the Fourth Proportional to 199,626.40, 299,439.60 and 128,767.60

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Solution

The fourth proportional to 199,626.40, 299,439.60 and 128,767.60 is: 193,151.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,626.40 : 299,439.60 = 128,767.60 : x
  2. Step 2: Convert to fraction form
    199,626.40/299,439.60 = 128,767.60/x
  3. Step 3: Cross multiply
    199,626.40x = 299,439.60 × 128,767.60
  4. Step 4: Simplify right side
    199,626.40x = 38,558,118,636.96
  5. Step 5: Solve for x
    x = 38,558,118,636.96/199,626.40
  6. Step 6: Final answer
    x = 193,151.40

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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.