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Finding the Fourth Proportional to 172,449.39, 258,674.19 and 47,790.39

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Solution

The fourth proportional to 172,449.39, 258,674.19 and 47,790.39 is: 71,685.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,449.39 : 258,674.19 = 47,790.39 : x
  2. Step 2: Convert to fraction form
    172,449.39/258,674.19 = 47,790.39/x
  3. Step 3: Cross multiply
    172,449.39x = 258,674.19 × 47,790.39
  4. Step 4: Simplify right side
    172,449.39x = 12,362,140,423.03
  5. Step 5: Solve for x
    x = 12,362,140,423.03/172,449.39
  6. Step 6: Final answer
    x = 71,685.61

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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.