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Finding the Fourth Proportional to 92,559.28, 138,821.29 and 45,126.76

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Solution

The fourth proportional to 92,559.28, 138,821.29 and 45,126.76 is: 67,681.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,559.28 : 138,821.29 = 45,126.76 : x
  2. Step 2: Convert to fraction form
    92,559.28/138,821.29 = 45,126.76/x
  3. Step 3: Cross multiply
    92,559.28x = 138,821.29 × 45,126.76
  4. Step 4: Simplify right side
    92,559.28x = 6,264,555,036.72
  5. Step 5: Solve for x
    x = 6,264,555,036.72/92,559.28
  6. Step 6: Final answer
    x = 67,681.54

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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.