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Finding the Fourth Proportional to 97,806.87, 134,976.69 and 55,364.49

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Solution

The fourth proportional to 97,806.87, 134,976.69 and 55,364.49 is: 76,404.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,806.87 : 134,976.69 = 55,364.49 : x
  2. Step 2: Convert to fraction form
    97,806.87/134,976.69 = 55,364.49/x
  3. Step 3: Cross multiply
    97,806.87x = 134,976.69 × 55,364.49
  4. Step 4: Simplify right side
    97,806.87x = 7,472,915,603.74
  5. Step 5: Solve for x
    x = 7,472,915,603.74/97,806.87
  6. Step 6: Final answer
    x = 76,404.81

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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.