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Finding the Fourth Proportional to 86,482.75, 129,728.10 and 26,506.93

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Solution

The fourth proportional to 86,482.75, 129,728.10 and 26,506.93 is: 39,761.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,482.75 : 129,728.10 = 26,506.93 : x
  2. Step 2: Convert to fraction form
    86,482.75/129,728.10 = 26,506.93/x
  3. Step 3: Cross multiply
    86,482.75x = 129,728.10 × 26,506.93
  4. Step 4: Simplify right side
    86,482.75x = 3,438,693,665.73
  5. Step 5: Solve for x
    x = 3,438,693,665.73/86,482.75
  6. Step 6: Final answer
    x = 39,761.61

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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.