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Finding the Fourth Proportional to 136,875.43, 188,869.43 and 76,438.37

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Solution

The fourth proportional to 136,875.43, 188,869.43 and 76,438.37 is: 105,474.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,875.43 : 188,869.43 = 76,438.37 : x
  2. Step 2: Convert to fraction form
    136,875.43/188,869.43 = 76,438.37/x
  3. Step 3: Cross multiply
    136,875.43x = 188,869.43 × 76,438.37
  4. Step 4: Simplify right side
    136,875.43x = 14,436,870,542.94
  5. Step 5: Solve for x
    x = 14,436,870,542.94/136,875.43
  6. Step 6: Final answer
    x = 105,474.52

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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.