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Finding the Fourth Proportional to 78,240.56, 107,961.60 and 44,253.68

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Solution

The fourth proportional to 78,240.56, 107,961.60 and 44,253.68 is: 61,064.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,240.56 : 107,961.60 = 44,253.68 : x
  2. Step 2: Convert to fraction form
    78,240.56/107,961.60 = 44,253.68/x
  3. Step 3: Cross multiply
    78,240.56x = 107,961.60 × 44,253.68
  4. Step 4: Simplify right side
    78,240.56x = 4,777,698,098.69
  5. Step 5: Solve for x
    x = 4,777,698,098.69/78,240.56
  6. Step 6: Final answer
    x = 61,064.21

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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.