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Finding the Fourth Proportional to 82,707.20, 124,060.80 and 73,521.80

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Solution

The fourth proportional to 82,707.20, 124,060.80 and 73,521.80 is: 110,282.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,707.20 : 124,060.80 = 73,521.80 : x
  2. Step 2: Convert to fraction form
    82,707.20/124,060.80 = 73,521.80/x
  3. Step 3: Cross multiply
    82,707.20x = 124,060.80 × 73,521.80
  4. Step 4: Simplify right side
    82,707.20x = 9,121,173,325.44
  5. Step 5: Solve for x
    x = 9,121,173,325.44/82,707.20
  6. Step 6: Final answer
    x = 110,282.70

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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.