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Finding the Fourth Proportional to 139,015.62, 208,362.11 and 63,978.21

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Solution

The fourth proportional to 139,015.62, 208,362.11 and 63,978.21 is: 95,893.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,015.62 : 208,362.11 = 63,978.21 : x
  2. Step 2: Convert to fraction form
    139,015.62/208,362.11 = 63,978.21/x
  3. Step 3: Cross multiply
    139,015.62x = 208,362.11 × 63,978.21
  4. Step 4: Simplify right side
    139,015.62x = 13,330,634,509.73
  5. Step 5: Solve for x
    x = 13,330,634,509.73/139,015.62
  6. Step 6: Final answer
    x = 95,893.07

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1.5x scale

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.