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Finding the Fourth Proportional to 86,040, 118,683.72 and 54,153.54

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Solution

The fourth proportional to 86,040, 118,683.72 and 54,153.54 is: 74,699.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,040 : 118,683.72 = 54,153.54 : x
  2. Step 2: Convert to fraction form
    86,040/118,683.72 = 54,153.54/x
  3. Step 3: Cross multiply
    86,040x = 118,683.72 × 54,153.54
  4. Step 4: Simplify right side
    86,040x = 6,427,143,578.37
  5. Step 5: Solve for x
    x = 6,427,143,578.37/86,040
  6. Step 6: Final answer
    x = 74,699.48

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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.