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Finding the Fourth Proportional to 136,688.28, 188,629.94 and 76,258.94

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Solution

The fourth proportional to 136,688.28, 188,629.94 and 76,258.94 is: 105,237.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,688.28 : 188,629.94 = 76,258.94 : x
  2. Step 2: Convert to fraction form
    136,688.28/188,629.94 = 76,258.94/x
  3. Step 3: Cross multiply
    136,688.28x = 188,629.94 × 76,258.94
  4. Step 4: Simplify right side
    136,688.28x = 14,384,718,524.16
  5. Step 5: Solve for x
    x = 14,384,718,524.16/136,688.28
  6. Step 6: Final answer
    x = 105,237.40

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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.