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Finding the Fourth Proportional to 98,783.60, 136,321.11 and 53,461.67

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Solution

The fourth proportional to 98,783.60, 136,321.11 and 53,461.67 is: 73,776.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,783.60 : 136,321.11 = 53,461.67 : x
  2. Step 2: Convert to fraction form
    98,783.60/136,321.11 = 53,461.67/x
  3. Step 3: Cross multiply
    98,783.60x = 136,321.11 × 53,461.67
  4. Step 4: Simplify right side
    98,783.60x = 7,287,954,196.85
  5. Step 5: Solve for x
    x = 7,287,954,196.85/98,783.60
  6. Step 6: Final answer
    x = 73,776.96

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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.