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Finding the Fourth Proportional to 84,861.56, 127,292.31 and 21,681.81

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Solution

The fourth proportional to 84,861.56, 127,292.31 and 21,681.81 is: 32,522.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,861.56 : 127,292.31 = 21,681.81 : x
  2. Step 2: Convert to fraction form
    84,861.56/127,292.31 = 21,681.81/x
  3. Step 3: Cross multiply
    84,861.56x = 127,292.31 × 21,681.81
  4. Step 4: Simplify right side
    84,861.56x = 2,759,927,679.88
  5. Step 5: Solve for x
    x = 2,759,927,679.88/84,861.56
  6. Step 6: Final answer
    x = 32,522.71

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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.