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Finding the Fourth Proportional to 109,649.60, 164,512.80 and 105,809.60

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Solution

The fourth proportional to 109,649.60, 164,512.80 and 105,809.60 is: 158,751.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,649.60 : 164,512.80 = 105,809.60 : x
  2. Step 2: Convert to fraction form
    109,649.60/164,512.80 = 105,809.60/x
  3. Step 3: Cross multiply
    109,649.60x = 164,512.80 × 105,809.60
  4. Step 4: Simplify right side
    109,649.60x = 17,407,033,562.88
  5. Step 5: Solve for x
    x = 17,407,033,562.88/109,649.60
  6. Step 6: Final answer
    x = 158,751.46

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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.