Home / 109,618.80-164,428.20-99,769.20

Finding the Fourth Proportional to 109,618.80, 164,428.20 and 99,769.20

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Solution

The fourth proportional to 109,618.80, 164,428.20 and 99,769.20 is: 149,653.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,618.80 : 164,428.20 = 99,769.20 : x
  2. Step 2: Convert to fraction form
    109,618.80/164,428.20 = 99,769.20/x
  3. Step 3: Cross multiply
    109,618.80x = 164,428.20 × 99,769.20
  4. Step 4: Simplify right side
    109,618.80x = 16,404,869,971.44
  5. Step 5: Solve for x
    x = 16,404,869,971.44/109,618.80
  6. Step 6: Final answer
    x = 149,653.80

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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.