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Finding the Fourth Proportional to 73,242.42, 109,789.56 and 28,851.90

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Solution

The fourth proportional to 73,242.42, 109,789.56 and 28,851.90 is: 43,248.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,242.42 : 109,789.56 = 28,851.90 : x
  2. Step 2: Convert to fraction form
    73,242.42/109,789.56 = 28,851.90/x
  3. Step 3: Cross multiply
    73,242.42x = 109,789.56 × 28,851.90
  4. Step 4: Simplify right side
    73,242.42x = 3,167,637,406.16
  5. Step 5: Solve for x
    x = 3,167,637,406.16/73,242.42
  6. Step 6: Final answer
    x = 43,248.67

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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.