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Finding the Fourth Proportional to 100,982.82, 139,355.52 and 55,660.89

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Solution

The fourth proportional to 100,982.82, 139,355.52 and 55,660.89 is: 76,811.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,982.82 : 139,355.52 = 55,660.89 : x
  2. Step 2: Convert to fraction form
    100,982.82/139,355.52 = 55,660.89/x
  3. Step 3: Cross multiply
    100,982.82x = 139,355.52 × 55,660.89
  4. Step 4: Simplify right side
    100,982.82x = 7,756,652,269.61
  5. Step 5: Solve for x
    x = 7,756,652,269.61/100,982.82
  6. Step 6: Final answer
    x = 76,811.60

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1.5x scale

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.