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Finding the Fourth Proportional to 74,710.60, 111,936.30 and 48,401.80

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Solution

The fourth proportional to 74,710.60, 111,936.30 and 48,401.80 is: 72,518.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,710.60 : 111,936.30 = 48,401.80 : x
  2. Step 2: Convert to fraction form
    74,710.60/111,936.30 = 48,401.80/x
  3. Step 3: Cross multiply
    74,710.60x = 111,936.30 × 48,401.80
  4. Step 4: Simplify right side
    74,710.60x = 5,417,918,405.34
  5. Step 5: Solve for x
    x = 5,417,918,405.34/74,710.60
  6. Step 6: Final answer
    x = 72,518.74

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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.