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Finding the Fourth Proportional to 172,705.80, 258,785.82 and 130,385.64

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Solution

The fourth proportional to 172,705.80, 258,785.82 and 130,385.64 is: 195,372.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,705.80 : 258,785.82 = 130,385.64 : x
  2. Step 2: Convert to fraction form
    172,705.80/258,785.82 = 130,385.64/x
  3. Step 3: Cross multiply
    172,705.80x = 258,785.82 × 130,385.64
  4. Step 4: Simplify right side
    172,705.80x = 33,741,954,763.62
  5. Step 5: Solve for x
    x = 33,741,954,763.62/172,705.80
  6. Step 6: Final answer
    x = 195,372.45

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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.