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Finding the Fourth Proportional to 110,479.40, 165,724.86 and 31,605.20

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Solution

The fourth proportional to 110,479.40, 165,724.86 and 31,605.20 is: 47,409.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,479.40 : 165,724.86 = 31,605.20 : x
  2. Step 2: Convert to fraction form
    110,479.40/165,724.86 = 31,605.20/x
  3. Step 3: Cross multiply
    110,479.40x = 165,724.86 × 31,605.20
  4. Step 4: Simplify right side
    110,479.40x = 5,237,767,345.27
  5. Step 5: Solve for x
    x = 5,237,767,345.27/110,479.40
  6. Step 6: Final answer
    x = 47,409.45

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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.