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Finding the Fourth Proportional to 136,922.70, 188,950.95 and 76,489.50

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Solution

The fourth proportional to 136,922.70, 188,950.95 and 76,489.50 is: 105,554.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,922.70 : 188,950.95 = 76,489.50 : x
  2. Step 2: Convert to fraction form
    136,922.70/188,950.95 = 76,489.50/x
  3. Step 3: Cross multiply
    136,922.70x = 188,950.95 × 76,489.50
  4. Step 4: Simplify right side
    136,922.70x = 14,452,763,690.03
  5. Step 5: Solve for x
    x = 14,452,763,690.03/136,922.70
  6. Step 6: Final answer
    x = 105,554.18

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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.