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Finding the Fourth Proportional to 205,450.92, 308,274.12 and 142,368.12

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Solution

The fourth proportional to 205,450.92, 308,274.12 and 142,368.12 is: 213,619.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,450.92 : 308,274.12 = 142,368.12 : x
  2. Step 2: Convert to fraction form
    205,450.92/308,274.12 = 142,368.12/x
  3. Step 3: Cross multiply
    205,450.92x = 308,274.12 × 142,368.12
  4. Step 4: Simplify right side
    205,450.92x = 43,888,406,909.05
  5. Step 5: Solve for x
    x = 43,888,406,909.05/205,450.92
  6. Step 6: Final answer
    x = 213,619.91

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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.