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Finding the Fourth Proportional to 192,052.40, 287,992.20 and 86,817.20

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Solution

The fourth proportional to 192,052.40, 287,992.20 and 86,817.20 is: 130,186.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,052.40 : 287,992.20 = 86,817.20 : x
  2. Step 2: Convert to fraction form
    192,052.40/287,992.20 = 86,817.20/x
  3. Step 3: Cross multiply
    192,052.40x = 287,992.20 × 86,817.20
  4. Step 4: Simplify right side
    192,052.40x = 25,002,676,425.84
  5. Step 5: Solve for x
    x = 25,002,676,425.84/192,052.40
  6. Step 6: Final answer
    x = 130,186.74

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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.