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Finding the Fourth Proportional to 107,808.75, 148,763.18 and 61,866.03

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Solution

The fourth proportional to 107,808.75, 148,763.18 and 61,866.03 is: 85,367.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,808.75 : 148,763.18 = 61,866.03 : x
  2. Step 2: Convert to fraction form
    107,808.75/148,763.18 = 61,866.03/x
  3. Step 3: Cross multiply
    107,808.75x = 148,763.18 × 61,866.03
  4. Step 4: Simplify right side
    107,808.75x = 9,203,387,047.45
  5. Step 5: Solve for x
    x = 9,203,387,047.45/107,808.75
  6. Step 6: Final answer
    x = 85,367.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.