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Finding the Fourth Proportional to 139,951.80, 209,921.32 and 45,186.35

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Solution

The fourth proportional to 139,951.80, 209,921.32 and 45,186.35 is: 67,777.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,951.80 : 209,921.32 = 45,186.35 : x
  2. Step 2: Convert to fraction form
    139,951.80/209,921.32 = 45,186.35/x
  3. Step 3: Cross multiply
    139,951.80x = 209,921.32 × 45,186.35
  4. Step 4: Simplify right side
    139,951.80x = 9,485,578,649.82
  5. Step 5: Solve for x
    x = 9,485,578,649.82/139,951.80
  6. Step 6: Final answer
    x = 67,777.47

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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.