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Finding the Fourth Proportional to 200,670.78, 300,930.84 and 65,703.72

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Solution

The fourth proportional to 200,670.78, 300,930.84 and 65,703.72 is: 98,530.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,670.78 : 300,930.84 = 65,703.72 : x
  2. Step 2: Convert to fraction form
    200,670.78/300,930.84 = 65,703.72/x
  3. Step 3: Cross multiply
    200,670.78x = 300,930.84 × 65,703.72
  4. Step 4: Simplify right side
    200,670.78x = 19,772,275,650.72
  5. Step 5: Solve for x
    x = 19,772,275,650.72/200,670.78
  6. Step 6: Final answer
    x = 98,530.92

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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.