Home / 85,511.09-128,255.10-22,335.65

Finding the Fourth Proportional to 85,511.09, 128,255.10 and 22,335.65

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Solution

The fourth proportional to 85,511.09, 128,255.10 and 22,335.65 is: 33,500.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,511.09 : 128,255.10 = 22,335.65 : x
  2. Step 2: Convert to fraction form
    85,511.09/128,255.10 = 22,335.65/x
  3. Step 3: Cross multiply
    85,511.09x = 128,255.10 × 22,335.65
  4. Step 4: Simplify right side
    85,511.09x = 2,864,660,780.24
  5. Step 5: Solve for x
    x = 2,864,660,780.24/85,511.09
  6. Step 6: Final answer
    x = 33,500.46

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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.