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Finding the Fourth Proportional to 172,129.53, 258,094.97 and 66,825.48

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Solution

The fourth proportional to 172,129.53, 258,094.97 and 66,825.48 is: 100,199.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,129.53 : 258,094.97 = 66,825.48 : x
  2. Step 2: Convert to fraction form
    172,129.53/258,094.97 = 66,825.48/x
  3. Step 3: Cross multiply
    172,129.53x = 258,094.97 × 66,825.48
  4. Step 4: Simplify right side
    172,129.53x = 17,247,319,921.71
  5. Step 5: Solve for x
    x = 17,247,319,921.71/172,129.53
  6. Step 6: Final answer
    x = 100,199.66

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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.