Home / 85,639.22-128,605.84-52,553.55

Finding the Fourth Proportional to 85,639.22, 128,605.84 and 52,553.55

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Solution

The fourth proportional to 85,639.22, 128,605.84 and 52,553.55 is: 78,920.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,639.22 : 128,605.84 = 52,553.55 : x
  2. Step 2: Convert to fraction form
    85,639.22/128,605.84 = 52,553.55/x
  3. Step 3: Cross multiply
    85,639.22x = 128,605.84 × 52,553.55
  4. Step 4: Simplify right side
    85,639.22x = 6,758,693,311.35
  5. Step 5: Solve for x
    x = 6,758,693,311.35/85,639.22
  6. Step 6: Final answer
    x = 78,920.54

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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.