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Finding the Fourth Proportional to 78,379.49, 108,180.74 and 48,190.66

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Solution

The fourth proportional to 78,379.49, 108,180.74 and 48,190.66 is: 66,513.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,379.49 : 108,180.74 = 48,190.66 : x
  2. Step 2: Convert to fraction form
    78,379.49/108,180.74 = 48,190.66/x
  3. Step 3: Cross multiply
    78,379.49x = 108,180.74 × 48,190.66
  4. Step 4: Simplify right side
    78,379.49x = 5,213,301,259.89
  5. Step 5: Solve for x
    x = 5,213,301,259.89/78,379.49
  6. Step 6: Final answer
    x = 66,513.59

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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.