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Finding the Fourth Proportional to 90,752.56, 125,220.18 and 53,019.52

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Solution

The fourth proportional to 90,752.56, 125,220.18 and 53,019.52 is: 73,156.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,752.56 : 125,220.18 = 53,019.52 : x
  2. Step 2: Convert to fraction form
    90,752.56/125,220.18 = 53,019.52/x
  3. Step 3: Cross multiply
    90,752.56x = 125,220.18 × 53,019.52
  4. Step 4: Simplify right side
    90,752.56x = 6,639,113,837.91
  5. Step 5: Solve for x
    x = 6,639,113,837.91/90,752.56
  6. Step 6: Final answer
    x = 73,156.22

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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.