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Finding the Fourth Proportional to 205,705.03, 308,591.86 and 70,763.65

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Solution

The fourth proportional to 205,705.03, 308,591.86 and 70,763.65 is: 106,157.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,705.03 : 308,591.86 = 70,763.65 : x
  2. Step 2: Convert to fraction form
    205,705.03/308,591.86 = 70,763.65/x
  3. Step 3: Cross multiply
    205,705.03x = 308,591.86 × 70,763.65
  4. Step 4: Simplify right side
    205,705.03x = 21,837,087,317.00
  5. Step 5: Solve for x
    x = 21,837,087,317.00/205,705.03
  6. Step 6: Final answer
    x = 106,157.28

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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.