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Finding the Fourth Proportional to 172,840.78, 238,522.39 and 100,260.48

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Solution

The fourth proportional to 172,840.78, 238,522.39 and 100,260.48 is: 138,360.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,840.78 : 238,522.39 = 100,260.48 : x
  2. Step 2: Convert to fraction form
    172,840.78/238,522.39 = 100,260.48/x
  3. Step 3: Cross multiply
    172,840.78x = 238,522.39 × 100,260.48
  4. Step 4: Simplify right side
    172,840.78x = 23,914,369,312.15
  5. Step 5: Solve for x
    x = 23,914,369,312.15/172,840.78
  6. Step 6: Final answer
    x = 138,360.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.