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Finding the Fourth Proportional to 109,351.60, 163,939.80 and 100,603.60

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Solution

The fourth proportional to 109,351.60, 163,939.80 and 100,603.60 is: 150,824.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,351.60 : 163,939.80 = 100,603.60 : x
  2. Step 2: Convert to fraction form
    109,351.60/163,939.80 = 100,603.60/x
  3. Step 3: Cross multiply
    109,351.60x = 163,939.80 × 100,603.60
  4. Step 4: Simplify right side
    109,351.60x = 16,492,934,063.28
  5. Step 5: Solve for x
    x = 16,492,934,063.28/109,351.60
  6. Step 6: Final answer
    x = 150,824.81

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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.