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Finding the Fourth Proportional to 136,894.87, 188,912.91 and 76,466.35

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Solution

The fourth proportional to 136,894.87, 188,912.91 and 76,466.35 is: 105,522.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,894.87 : 188,912.91 = 76,466.35 : x
  2. Step 2: Convert to fraction form
    136,894.87/188,912.91 = 76,466.35/x
  3. Step 3: Cross multiply
    136,894.87x = 188,912.91 × 76,466.35
  4. Step 4: Simplify right side
    136,894.87x = 14,445,480,695.58
  5. Step 5: Solve for x
    x = 14,445,480,695.58/136,894.87
  6. Step 6: Final answer
    x = 105,522.44

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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.