Home / 143,986.60-215,979.90-128,823.40

Finding the Fourth Proportional to 143,986.60, 215,979.90 and 128,823.40

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Solution

The fourth proportional to 143,986.60, 215,979.90 and 128,823.40 is: 193,235.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,986.60 : 215,979.90 = 128,823.40 : x
  2. Step 2: Convert to fraction form
    143,986.60/215,979.90 = 128,823.40/x
  3. Step 3: Cross multiply
    143,986.60x = 215,979.90 × 128,823.40
  4. Step 4: Simplify right side
    143,986.60x = 27,823,265,049.66
  5. Step 5: Solve for x
    x = 27,823,265,049.66/143,986.60
  6. Step 6: Final answer
    x = 193,235.10

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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.