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Finding the Fourth Proportional to 82,690.20, 124,035.30 and 63,007.20

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Solution

The fourth proportional to 82,690.20, 124,035.30 and 63,007.20 is: 94,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,690.20 : 124,035.30 = 63,007.20 : x
  2. Step 2: Convert to fraction form
    82,690.20/124,035.30 = 63,007.20/x
  3. Step 3: Cross multiply
    82,690.20x = 124,035.30 × 63,007.20
  4. Step 4: Simplify right side
    82,690.20x = 7,815,116,954.16
  5. Step 5: Solve for x
    x = 7,815,116,954.16/82,690.20
  6. Step 6: Final answer
    x = 94,510.80

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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.