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Finding the Fourth Proportional to 200,551.68, 300,620.16 and 86,772.60

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Solution

The fourth proportional to 200,551.68, 300,620.16 and 86,772.60 is: 130,069.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,551.68 : 300,620.16 = 86,772.60 : x
  2. Step 2: Convert to fraction form
    200,551.68/300,620.16 = 86,772.60/x
  3. Step 3: Cross multiply
    200,551.68x = 300,620.16 × 86,772.60
  4. Step 4: Simplify right side
    200,551.68x = 26,085,592,895.62
  5. Step 5: Solve for x
    x = 26,085,592,895.62/200,551.68
  6. Step 6: Final answer
    x = 130,069.18

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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.