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Finding the Fourth Proportional to 251,638.44, 347,258.16 and 136,920.48

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Solution

The fourth proportional to 251,638.44, 347,258.16 and 136,920.48 is: 188,948.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,638.44 : 347,258.16 = 136,920.48 : x
  2. Step 2: Convert to fraction form
    251,638.44/347,258.16 = 136,920.48/x
  3. Step 3: Cross multiply
    251,638.44x = 347,258.16 × 136,920.48
  4. Step 4: Simplify right side
    251,638.44x = 47,546,753,951.12
  5. Step 5: Solve for x
    x = 47,546,753,951.12/251,638.44
  6. Step 6: Final answer
    x = 188,948.69

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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.