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Finding the Fourth Proportional to 200,312.40, 300,079.80 and 111,406.80

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Solution

The fourth proportional to 200,312.40, 300,079.80 and 111,406.80 is: 166,893.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,312.40 : 300,079.80 = 111,406.80 : x
  2. Step 2: Convert to fraction form
    200,312.40/300,079.80 = 111,406.80/x
  3. Step 3: Cross multiply
    200,312.40x = 300,079.80 × 111,406.80
  4. Step 4: Simplify right side
    200,312.40x = 33,430,930,262.64
  5. Step 5: Solve for x
    x = 33,430,930,262.64/200,312.40
  6. Step 6: Final answer
    x = 166,893.96

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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.