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Finding the Fourth Proportional to 84,921.30, 127,418.40 and 43,368.30

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Solution

The fourth proportional to 84,921.30, 127,418.40 and 43,368.30 is: 65,071.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,921.30 : 127,418.40 = 43,368.30 : x
  2. Step 2: Convert to fraction form
    84,921.30/127,418.40 = 43,368.30/x
  3. Step 3: Cross multiply
    84,921.30x = 127,418.40 × 43,368.30
  4. Step 4: Simplify right side
    84,921.30x = 5,525,919,396.72
  5. Step 5: Solve for x
    x = 5,525,919,396.72/84,921.30
  6. Step 6: Final answer
    x = 65,071.06

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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.