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Finding the Fourth Proportional to 172,300.66, 258,451.08 and 65,659.75

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Solution

The fourth proportional to 172,300.66, 258,451.08 and 65,659.75 is: 98,489.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,300.66 : 258,451.08 = 65,659.75 : x
  2. Step 2: Convert to fraction form
    172,300.66/258,451.08 = 65,659.75/x
  3. Step 3: Cross multiply
    172,300.66x = 258,451.08 × 65,659.75
  4. Step 4: Simplify right side
    172,300.66x = 16,969,833,300.03
  5. Step 5: Solve for x
    x = 16,969,833,300.03/172,300.66
  6. Step 6: Final answer
    x = 98,489.66

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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.