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Finding the Fourth Proportional to 72,208.60, 108,021.30 and 62,456.20

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Solution

The fourth proportional to 72,208.60, 108,021.30 and 62,456.20 is: 93,432.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,208.60 : 108,021.30 = 62,456.20 : x
  2. Step 2: Convert to fraction form
    72,208.60/108,021.30 = 62,456.20/x
  3. Step 3: Cross multiply
    72,208.60x = 108,021.30 × 62,456.20
  4. Step 4: Simplify right side
    72,208.60x = 6,746,599,917.06
  5. Step 5: Solve for x
    x = 6,746,599,917.06/72,208.60
  6. Step 6: Final answer
    x = 93,432.08

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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.