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Finding the Fourth Proportional to 272,968.20, 409,379.40 and 83,428.20

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Solution

The fourth proportional to 272,968.20, 409,379.40 and 83,428.20 is: 125,120.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,968.20 : 409,379.40 = 83,428.20 : x
  2. Step 2: Convert to fraction form
    272,968.20/409,379.40 = 83,428.20/x
  3. Step 3: Cross multiply
    272,968.20x = 409,379.40 × 83,428.20
  4. Step 4: Simplify right side
    272,968.20x = 34,153,786,459.08
  5. Step 5: Solve for x
    x = 34,153,786,459.08/272,968.20
  6. Step 6: Final answer
    x = 125,120.02

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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.