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Finding the Fourth Proportional to 73,128.09, 109,692.15 and 17,724.09

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Solution

The fourth proportional to 73,128.09, 109,692.15 and 17,724.09 is: 26,586.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,128.09 : 109,692.15 = 17,724.09 : x
  2. Step 2: Convert to fraction form
    73,128.09/109,692.15 = 17,724.09/x
  3. Step 3: Cross multiply
    73,128.09x = 109,692.15 × 17,724.09
  4. Step 4: Simplify right side
    73,128.09x = 1,944,193,883.77
  5. Step 5: Solve for x
    x = 1,944,193,883.77/73,128.09
  6. Step 6: Final answer
    x = 26,586.14

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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.