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Finding the Fourth Proportional to 200,086.69, 300,130.54 and 81,758.03

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Solution

The fourth proportional to 200,086.69, 300,130.54 and 81,758.03 is: 122,637.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,086.69 : 300,130.54 = 81,758.03 : x
  2. Step 2: Convert to fraction form
    200,086.69/300,130.54 = 81,758.03/x
  3. Step 3: Cross multiply
    200,086.69x = 300,130.54 × 81,758.03
  4. Step 4: Simplify right side
    200,086.69x = 24,538,079,988.19
  5. Step 5: Solve for x
    x = 24,538,079,988.19/200,086.69
  6. Step 6: Final answer
    x = 122,637.24

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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.