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Finding the Fourth Proportional to 48,749.64, 73,124.70 and 13,689.60

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Solution

The fourth proportional to 48,749.64, 73,124.70 and 13,689.60 is: 20,534.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,749.64 : 73,124.70 = 13,689.60 : x
  2. Step 2: Convert to fraction form
    48,749.64/73,124.70 = 13,689.60/x
  3. Step 3: Cross multiply
    48,749.64x = 73,124.70 × 13,689.60
  4. Step 4: Simplify right side
    48,749.64x = 1,001,047,893.12
  5. Step 5: Solve for x
    x = 1,001,047,893.12/48,749.64
  6. Step 6: Final answer
    x = 20,534.47

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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.