Home / 109,618.40-164,427.60-79,729.40

Finding the Fourth Proportional to 109,618.40, 164,427.60 and 79,729.40

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Solution

The fourth proportional to 109,618.40, 164,427.60 and 79,729.40 is: 119,594.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,618.40 : 164,427.60 = 79,729.40 : x
  2. Step 2: Convert to fraction form
    109,618.40/164,427.60 = 79,729.40/x
  3. Step 3: Cross multiply
    109,618.40x = 164,427.60 × 79,729.40
  4. Step 4: Simplify right side
    109,618.40x = 13,109,713,891.44
  5. Step 5: Solve for x
    x = 13,109,713,891.44/109,618.40
  6. Step 6: Final answer
    x = 119,594.10

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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.