Home / 85,839.10-128,722.20-41,479.45

Finding the Fourth Proportional to 85,839.10, 128,722.20 and 41,479.45

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Solution

The fourth proportional to 85,839.10, 128,722.20 and 41,479.45 is: 62,201.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839.10 : 128,722.20 = 41,479.45 : x
  2. Step 2: Convert to fraction form
    85,839.10/128,722.20 = 41,479.45/x
  3. Step 3: Cross multiply
    85,839.10x = 128,722.20 × 41,479.45
  4. Step 4: Simplify right side
    85,839.10x = 5,339,326,058.79
  5. Step 5: Solve for x
    x = 5,339,326,058.79/85,839.10
  6. Step 6: Final answer
    x = 62,201.56

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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.