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Finding the Fourth Proportional to 139,015.87, 208,362.48 and 63,978.46

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Solution

The fourth proportional to 139,015.87, 208,362.48 and 63,978.46 is: 95,893.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,015.87 : 208,362.48 = 63,978.46 : x
  2. Step 2: Convert to fraction form
    139,015.87/208,362.48 = 63,978.46/x
  3. Step 3: Cross multiply
    139,015.87x = 208,362.48 × 63,978.46
  4. Step 4: Simplify right side
    139,015.87x = 13,330,710,592.18
  5. Step 5: Solve for x
    x = 13,330,710,592.18/139,015.87
  6. Step 6: Final answer
    x = 95,893.44

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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.