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Finding the Fourth Proportional to 84,699.89, 127,043.88 and 39,731.10

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Solution

The fourth proportional to 84,699.89, 127,043.88 and 39,731.10 is: 59,593.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,699.89 : 127,043.88 = 39,731.10 : x
  2. Step 2: Convert to fraction form
    84,699.89/127,043.88 = 39,731.10/x
  3. Step 3: Cross multiply
    84,699.89x = 127,043.88 × 39,731.10
  4. Step 4: Simplify right side
    84,699.89x = 5,047,593,100.67
  5. Step 5: Solve for x
    x = 5,047,593,100.67/84,699.89
  6. Step 6: Final answer
    x = 59,593.86

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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.