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Finding the Fourth Proportional to 135,487.20, 202,885.20 and 107,839.20

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Solution

The fourth proportional to 135,487.20, 202,885.20 and 107,839.20 is: 161,483.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,487.20 : 202,885.20 = 107,839.20 : x
  2. Step 2: Convert to fraction form
    135,487.20/202,885.20 = 107,839.20/x
  3. Step 3: Cross multiply
    135,487.20x = 202,885.20 × 107,839.20
  4. Step 4: Simplify right side
    135,487.20x = 21,878,977,659.84
  5. Step 5: Solve for x
    x = 21,878,977,659.84/135,487.20
  6. Step 6: Final answer
    x = 161,483.72

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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.