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Finding the Fourth Proportional to 72,427.80, 108,641.70 and 25,042.80

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Solution

The fourth proportional to 72,427.80, 108,641.70 and 25,042.80 is: 37,564.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,427.80 : 108,641.70 = 25,042.80 : x
  2. Step 2: Convert to fraction form
    72,427.80/108,641.70 = 25,042.80/x
  3. Step 3: Cross multiply
    72,427.80x = 108,641.70 × 25,042.80
  4. Step 4: Simplify right side
    72,427.80x = 2,720,692,364.76
  5. Step 5: Solve for x
    x = 2,720,692,364.76/72,427.80
  6. Step 6: Final answer
    x = 37,564.20

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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.