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Finding the Fourth Proportional to 85,083.69, 127,699.29 and 84,886.86

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Solution

The fourth proportional to 85,083.69, 127,699.29 and 84,886.86 is: 127,403.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,083.69 : 127,699.29 = 84,886.86 : x
  2. Step 2: Convert to fraction form
    85,083.69/127,699.29 = 84,886.86/x
  3. Step 3: Cross multiply
    85,083.69x = 127,699.29 × 84,886.86
  4. Step 4: Simplify right side
    85,083.69x = 10,839,991,752.33
  5. Step 5: Solve for x
    x = 10,839,991,752.33/85,083.69
  6. Step 6: Final answer
    x = 127,403.87

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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.