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Finding the Fourth Proportional to 78,355, 108,129.90 and 44,821

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Solution

The fourth proportional to 78,355, 108,129.90 and 44,821 is: 61,852.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,355 : 108,129.90 = 44,821 : x
  2. Step 2: Convert to fraction form
    78,355/108,129.90 = 44,821/x
  3. Step 3: Cross multiply
    78,355x = 108,129.90 × 44,821
  4. Step 4: Simplify right side
    78,355x = 4,846,490,247.90
  5. Step 5: Solve for x
    x = 4,846,490,247.90/78,355
  6. Step 6: Final answer
    x = 61,852.98

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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.