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Finding the Fourth Proportional to 172,704.80, 258,784.32 and 130,384.64

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Solution

The fourth proportional to 172,704.80, 258,784.32 and 130,384.64 is: 195,370.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,704.80 : 258,784.32 = 130,384.64 : x
  2. Step 2: Convert to fraction form
    172,704.80/258,784.32 = 130,384.64/x
  3. Step 3: Cross multiply
    172,704.80x = 258,784.32 × 130,384.64
  4. Step 4: Simplify right side
    172,704.80x = 33,741,500,400.84
  5. Step 5: Solve for x
    x = 33,741,500,400.84/172,704.80
  6. Step 6: Final answer
    x = 195,370.95

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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.