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Finding the Fourth Proportional to 70,828.73, 106,230.79 and 26,455.87

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Solution

The fourth proportional to 70,828.73, 106,230.79 and 26,455.87 is: 39,679.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,828.73 : 106,230.79 = 26,455.87 : x
  2. Step 2: Convert to fraction form
    70,828.73/106,230.79 = 26,455.87/x
  3. Step 3: Cross multiply
    70,828.73x = 106,230.79 × 26,455.87
  4. Step 4: Simplify right side
    70,828.73x = 2,810,427,538.55
  5. Step 5: Solve for x
    x = 2,810,427,538.55/70,828.73
  6. Step 6: Final answer
    x = 39,679.20

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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.