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Finding the Fourth Proportional to 92,798.10, 128,060 and 54,561.96

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Solution

The fourth proportional to 92,798.10, 128,060 and 54,561.96 is: 75,294.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,798.10 : 128,060 = 54,561.96 : x
  2. Step 2: Convert to fraction form
    92,798.10/128,060 = 54,561.96/x
  3. Step 3: Cross multiply
    92,798.10x = 128,060 × 54,561.96
  4. Step 4: Simplify right side
    92,798.10x = 6,987,204,597.60
  5. Step 5: Solve for x
    x = 6,987,204,597.60/92,798.10
  6. Step 6: Final answer
    x = 75,294.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.