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Finding the Fourth Proportional to 205,702.30, 308,576.13 and 65,428.12

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Solution

The fourth proportional to 205,702.30, 308,576.13 and 65,428.12 is: 98,149.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,702.30 : 308,576.13 = 65,428.12 : x
  2. Step 2: Convert to fraction form
    205,702.30/308,576.13 = 65,428.12/x
  3. Step 3: Cross multiply
    205,702.30x = 308,576.13 × 65,428.12
  4. Step 4: Simplify right side
    205,702.30x = 20,189,556,062.78
  5. Step 5: Solve for x
    x = 20,189,556,062.78/205,702.30
  6. Step 6: Final answer
    x = 98,149.39

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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.