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Finding the Fourth Proportional to 136,893.30, 188,910.74 and 76,464.80

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Solution

The fourth proportional to 136,893.30, 188,910.74 and 76,464.80 is: 105,520.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,893.30 : 188,910.74 = 76,464.80 : x
  2. Step 2: Convert to fraction form
    136,893.30/188,910.74 = 76,464.80/x
  3. Step 3: Cross multiply
    136,893.30x = 188,910.74 × 76,464.80
  4. Step 4: Simplify right side
    136,893.30x = 14,445,020,625.07
  5. Step 5: Solve for x
    x = 14,445,020,625.07/136,893.30
  6. Step 6: Final answer
    x = 105,520.29

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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.