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Finding the Fourth Proportional to 113,409.36, 169,919.64 and 80,069.76

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Solution

The fourth proportional to 113,409.36, 169,919.64 and 80,069.76 is: 119,967.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,409.36 : 169,919.64 = 80,069.76 : x
  2. Step 2: Convert to fraction form
    113,409.36/169,919.64 = 80,069.76/x
  3. Step 3: Cross multiply
    113,409.36x = 169,919.64 × 80,069.76
  4. Step 4: Simplify right side
    113,409.36x = 13,605,424,794.09
  5. Step 5: Solve for x
    x = 13,605,424,794.09/113,409.36
  6. Step 6: Final answer
    x = 119,967.39

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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.