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Finding the Fourth Proportional to 78,985.74, 108,999.87 and 44,995.68

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Solution

The fourth proportional to 78,985.74, 108,999.87 and 44,995.68 is: 62,093.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,985.74 : 108,999.87 = 44,995.68 : x
  2. Step 2: Convert to fraction form
    78,985.74/108,999.87 = 44,995.68/x
  3. Step 3: Cross multiply
    78,985.74x = 108,999.87 × 44,995.68
  4. Step 4: Simplify right side
    78,985.74x = 4,904,523,270.56
  5. Step 5: Solve for x
    x = 4,904,523,270.56/78,985.74
  6. Step 6: Final answer
    x = 62,093.78

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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.