Home / 200,009.85-300,015.07-81,681.20

Finding the Fourth Proportional to 200,009.85, 300,015.07 and 81,681.20

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Solution

The fourth proportional to 200,009.85, 300,015.07 and 81,681.20 is: 122,521.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,009.85 : 300,015.07 = 81,681.20 : x
  2. Step 2: Convert to fraction form
    200,009.85/300,015.07 = 81,681.20/x
  3. Step 3: Cross multiply
    200,009.85x = 300,015.07 × 81,681.20
  4. Step 4: Simplify right side
    200,009.85x = 24,505,590,935.68
  5. Step 5: Solve for x
    x = 24,505,590,935.68/200,009.85
  6. Step 6: Final answer
    x = 122,521.92

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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.