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Finding the Fourth Proportional to 85,779.84, 128,673.85 and 41,443.88

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Solution

The fourth proportional to 85,779.84, 128,673.85 and 41,443.88 is: 62,167.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,779.84 : 128,673.85 = 41,443.88 : x
  2. Step 2: Convert to fraction form
    85,779.84/128,673.85 = 41,443.88/x
  3. Step 3: Cross multiply
    85,779.84x = 128,673.85 × 41,443.88
  4. Step 4: Simplify right side
    85,779.84x = 5,332,743,466.00
  5. Step 5: Solve for x
    x = 5,332,743,466.00/85,779.84
  6. Step 6: Final answer
    x = 62,167.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.