Home / 99,771.36-137,683.80-55,059.36

Finding the Fourth Proportional to 99,771.36, 137,683.80 and 55,059.36

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Solution

The fourth proportional to 99,771.36, 137,683.80 and 55,059.36 is: 75,981.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,771.36 : 137,683.80 = 55,059.36 : x
  2. Step 2: Convert to fraction form
    99,771.36/137,683.80 = 55,059.36/x
  3. Step 3: Cross multiply
    99,771.36x = 137,683.80 × 55,059.36
  4. Step 4: Simplify right side
    99,771.36x = 7,580,781,910.37
  5. Step 5: Solve for x
    x = 7,580,781,910.37/99,771.36
  6. Step 6: Final answer
    x = 75,981.54

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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.