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Finding the Fourth Proportional to 109,046.88, 163,361.76 and 91,390.48

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Solution

The fourth proportional to 109,046.88, 163,361.76 and 91,390.48 is: 136,910.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,046.88 : 163,361.76 = 91,390.48 : x
  2. Step 2: Convert to fraction form
    109,046.88/163,361.76 = 91,390.48/x
  3. Step 3: Cross multiply
    109,046.88x = 163,361.76 × 91,390.48
  4. Step 4: Simplify right side
    109,046.88x = 14,929,709,660.04
  5. Step 5: Solve for x
    x = 14,929,709,660.04/109,046.88
  6. Step 6: Final answer
    x = 136,910.93

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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.