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Finding the Fourth Proportional to 81,428.56, 112,377.99 and 45,626.56

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Solution

The fourth proportional to 81,428.56, 112,377.99 and 45,626.56 is: 62,968.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,428.56 : 112,377.99 = 45,626.56 : x
  2. Step 2: Convert to fraction form
    81,428.56/112,377.99 = 45,626.56/x
  3. Step 3: Cross multiply
    81,428.56x = 112,377.99 × 45,626.56
  4. Step 4: Simplify right side
    81,428.56x = 5,127,421,103.41
  5. Step 5: Solve for x
    x = 5,127,421,103.41/81,428.56
  6. Step 6: Final answer
    x = 62,968.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.