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Finding the Fourth Proportional to 251,868, 347,577.84 and 138,690.48

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Solution

The fourth proportional to 251,868, 347,577.84 and 138,690.48 is: 191,392.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,868 : 347,577.84 = 138,690.48 : x
  2. Step 2: Convert to fraction form
    251,868/347,577.84 = 138,690.48/x
  3. Step 3: Cross multiply
    251,868x = 347,577.84 × 138,690.48
  4. Step 4: Simplify right side
    251,868x = 48,205,737,466.96
  5. Step 5: Solve for x
    x = 48,205,737,466.96/251,868
  6. Step 6: Final answer
    x = 191,392.86

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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.