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Finding the Fourth Proportional to 79,803.40, 119,705.08 and 20,645.04

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Solution

The fourth proportional to 79,803.40, 119,705.08 and 20,645.04 is: 30,967.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,803.40 : 119,705.08 = 20,645.04 : x
  2. Step 2: Convert to fraction form
    79,803.40/119,705.08 = 20,645.04/x
  3. Step 3: Cross multiply
    79,803.40x = 119,705.08 × 20,645.04
  4. Step 4: Simplify right side
    79,803.40x = 2,471,316,164.80
  5. Step 5: Solve for x
    x = 2,471,316,164.80/79,803.40
  6. Step 6: Final answer
    x = 30,967.55

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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.