Home / 109,219.40-163,634.70-89,390.60

Finding the Fourth Proportional to 109,219.40, 163,634.70 and 89,390.60

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Solution

The fourth proportional to 109,219.40, 163,634.70 and 89,390.60 is: 133,926.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,219.40 : 163,634.70 = 89,390.60 : x
  2. Step 2: Convert to fraction form
    109,219.40/163,634.70 = 89,390.60/x
  3. Step 3: Cross multiply
    109,219.40x = 163,634.70 × 89,390.60
  4. Step 4: Simplify right side
    109,219.40x = 14,627,404,013.82
  5. Step 5: Solve for x
    x = 14,627,404,013.82/109,219.40
  6. Step 6: Final answer
    x = 133,926.79

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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.