Home / 85,947.19-128,920.39-26,782.90

Finding the Fourth Proportional to 85,947.19, 128,920.39 and 26,782.90

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Solution

The fourth proportional to 85,947.19, 128,920.39 and 26,782.90 is: 40,174.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,947.19 : 128,920.39 = 26,782.90 : x
  2. Step 2: Convert to fraction form
    85,947.19/128,920.39 = 26,782.90/x
  3. Step 3: Cross multiply
    85,947.19x = 128,920.39 × 26,782.90
  4. Step 4: Simplify right side
    85,947.19x = 3,452,861,913.33
  5. Step 5: Solve for x
    x = 3,452,861,913.33/85,947.19
  6. Step 6: Final answer
    x = 40,174.23

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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.