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Finding the Fourth Proportional to 61,809.12, 92,713.92 and 43,423.20

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Solution

The fourth proportional to 61,809.12, 92,713.92 and 43,423.20 is: 65,134.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,809.12 : 92,713.92 = 43,423.20 : x
  2. Step 2: Convert to fraction form
    61,809.12/92,713.92 = 43,423.20/x
  3. Step 3: Cross multiply
    61,809.12x = 92,713.92 × 43,423.20
  4. Step 4: Simplify right side
    61,809.12x = 4,025,935,090.94
  5. Step 5: Solve for x
    x = 4,025,935,090.94/61,809.12
  6. Step 6: Final answer
    x = 65,134.97

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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.