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Finding the Fourth Proportional to 78,813.72, 108,764.16 and 44,821.32

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Solution

The fourth proportional to 78,813.72, 108,764.16 and 44,821.32 is: 61,854.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,813.72 : 108,764.16 = 44,821.32 : x
  2. Step 2: Convert to fraction form
    78,813.72/108,764.16 = 44,821.32/x
  3. Step 3: Cross multiply
    78,813.72x = 108,764.16 × 44,821.32
  4. Step 4: Simplify right side
    78,813.72x = 4,874,953,219.89
  5. Step 5: Solve for x
    x = 4,874,953,219.89/78,813.72
  6. Step 6: Final answer
    x = 61,854.12

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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.