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Finding the Fourth Proportional to 200,009.73, 300,051.95 and 66,890.68

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Solution

The fourth proportional to 200,009.73, 300,051.95 and 66,890.68 is: 100,348.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,009.73 : 300,051.95 = 66,890.68 : x
  2. Step 2: Convert to fraction form
    200,009.73/300,051.95 = 66,890.68/x
  3. Step 3: Cross multiply
    200,009.73x = 300,051.95 × 66,890.68
  4. Step 4: Simplify right side
    200,009.73x = 20,070,678,970.83
  5. Step 5: Solve for x
    x = 20,070,678,970.83/200,009.73
  6. Step 6: Final answer
    x = 100,348.51

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1.5x scale

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.