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Finding the Fourth Proportional to 139,851.72, 209,783.34 and 73,254.60

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Solution

The fourth proportional to 139,851.72, 209,783.34 and 73,254.60 is: 109,884.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,851.72 : 209,783.34 = 73,254.60 : x
  2. Step 2: Convert to fraction form
    139,851.72/209,783.34 = 73,254.60/x
  3. Step 3: Cross multiply
    139,851.72x = 209,783.34 × 73,254.60
  4. Step 4: Simplify right side
    139,851.72x = 15,367,594,658.36
  5. Step 5: Solve for x
    x = 15,367,594,658.36/139,851.72
  6. Step 6: Final answer
    x = 109,884.92

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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.