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Finding the Fourth Proportional to 139,602.36, 209,383.78 and 44,840.78

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Solution

The fourth proportional to 139,602.36, 209,383.78 and 44,840.78 is: 67,254.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,602.36 : 209,383.78 = 44,840.78 : x
  2. Step 2: Convert to fraction form
    139,602.36/209,383.78 = 44,840.78/x
  3. Step 3: Cross multiply
    139,602.36x = 209,383.78 × 44,840.78
  4. Step 4: Simplify right side
    139,602.36x = 9,388,932,014.55
  5. Step 5: Solve for x
    x = 9,388,932,014.55/139,602.36
  6. Step 6: Final answer
    x = 67,254.82

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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.