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Finding the Fourth Proportional to 172,080.96, 258,120.41 and 66,899.93

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Solution

The fourth proportional to 172,080.96, 258,120.41 and 66,899.93 is: 100,349.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,080.96 : 258,120.41 = 66,899.93 : x
  2. Step 2: Convert to fraction form
    172,080.96/258,120.41 = 66,899.93/x
  3. Step 3: Cross multiply
    172,080.96x = 258,120.41 × 66,899.93
  4. Step 4: Simplify right side
    172,080.96x = 17,268,237,360.57
  5. Step 5: Solve for x
    x = 17,268,237,360.57/172,080.96
  6. Step 6: Final answer
    x = 100,349.49

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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.