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Finding the Fourth Proportional to 109,289.40, 163,905.30 and 34,409.40

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Solution

The fourth proportional to 109,289.40, 163,905.30 and 34,409.40 is: 51,605.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,289.40 : 163,905.30 = 34,409.40 : x
  2. Step 2: Convert to fraction form
    109,289.40/163,905.30 = 34,409.40/x
  3. Step 3: Cross multiply
    109,289.40x = 163,905.30 × 34,409.40
  4. Step 4: Simplify right side
    109,289.40x = 5,639,883,029.82
  5. Step 5: Solve for x
    x = 5,639,883,029.82/109,289.40
  6. Step 6: Final answer
    x = 51,605.03

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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.