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Finding the Fourth Proportional to 86,216.03, 118,978.10 and 48,490.25

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Solution

The fourth proportional to 86,216.03, 118,978.10 and 48,490.25 is: 66,916.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,216.03 : 118,978.10 = 48,490.25 : x
  2. Step 2: Convert to fraction form
    86,216.03/118,978.10 = 48,490.25/x
  3. Step 3: Cross multiply
    86,216.03x = 118,978.10 × 48,490.25
  4. Step 4: Simplify right side
    86,216.03x = 5,769,277,571.07
  5. Step 5: Solve for x
    x = 5,769,277,571.07/86,216.03
  6. Step 6: Final answer
    x = 66,916.53

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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.