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Finding the Fourth Proportional to 85,799.09, 128,678.13 and 29,641.20

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Solution

The fourth proportional to 85,799.09, 128,678.13 and 29,641.20 is: 44,454.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,799.09 : 128,678.13 = 29,641.20 : x
  2. Step 2: Convert to fraction form
    85,799.09/128,678.13 = 29,641.20/x
  3. Step 3: Cross multiply
    85,799.09x = 128,678.13 × 29,641.20
  4. Step 4: Simplify right side
    85,799.09x = 3,814,174,186.96
  5. Step 5: Solve for x
    x = 3,814,174,186.96/85,799.09
  6. Step 6: Final answer
    x = 44,454.72

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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.