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Finding the Fourth Proportional to 100,898.76, 139,241.25 and 55,576.94

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Solution

The fourth proportional to 100,898.76, 139,241.25 and 55,576.94 is: 76,696.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,898.76 : 139,241.25 = 55,576.94 : x
  2. Step 2: Convert to fraction form
    100,898.76/139,241.25 = 55,576.94/x
  3. Step 3: Cross multiply
    100,898.76x = 139,241.25 × 55,576.94
  4. Step 4: Simplify right side
    100,898.76x = 7,738,602,944.88
  5. Step 5: Solve for x
    x = 7,738,602,944.88/100,898.76
  6. Step 6: Final answer
    x = 76,696.71

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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.