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Finding the Fourth Proportional to 136,171.40, 204,038.40 and 128,298.20

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Solution

The fourth proportional to 136,171.40, 204,038.40 and 128,298.20 is: 192,241.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,171.40 : 204,038.40 = 128,298.20 : x
  2. Step 2: Convert to fraction form
    136,171.40/204,038.40 = 128,298.20/x
  3. Step 3: Cross multiply
    136,171.40x = 204,038.40 × 128,298.20
  4. Step 4: Simplify right side
    136,171.40x = 26,177,759,450.88
  5. Step 5: Solve for x
    x = 26,177,759,450.88/136,171.40
  6. Step 6: Final answer
    x = 192,241.24

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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.