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Finding the Fourth Proportional to 84,984.30, 127,512.90 and 43,431.30

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Solution

The fourth proportional to 84,984.30, 127,512.90 and 43,431.30 is: 65,165.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,984.30 : 127,512.90 = 43,431.30 : x
  2. Step 2: Convert to fraction form
    84,984.30/127,512.90 = 43,431.30/x
  3. Step 3: Cross multiply
    84,984.30x = 127,512.90 × 43,431.30
  4. Step 4: Simplify right side
    84,984.30x = 5,538,051,013.77
  5. Step 5: Solve for x
    x = 5,538,051,013.77/84,984.30
  6. Step 6: Final answer
    x = 65,165.58

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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.