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Finding the Fourth Proportional to 100,982.38, 139,355.04 and 55,041.94

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Solution

The fourth proportional to 100,982.38, 139,355.04 and 55,041.94 is: 75,957.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,982.38 : 139,355.04 = 55,041.94 : x
  2. Step 2: Convert to fraction form
    100,982.38/139,355.04 = 55,041.94/x
  3. Step 3: Cross multiply
    100,982.38x = 139,355.04 × 55,041.94
  4. Step 4: Simplify right side
    100,982.38x = 7,670,371,750.38
  5. Step 5: Solve for x
    x = 7,670,371,750.38/100,982.38
  6. Step 6: Final answer
    x = 75,957.53

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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.