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Finding the Fourth Proportional to 139,009.59, 208,353.09 and 63,972.21

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Solution

The fourth proportional to 139,009.59, 208,353.09 and 63,972.21 is: 95,884.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,009.59 : 208,353.09 = 63,972.21 : x
  2. Step 2: Convert to fraction form
    139,009.59/208,353.09 = 63,972.21/x
  3. Step 3: Cross multiply
    139,009.59x = 208,353.09 × 63,972.21
  4. Step 4: Simplify right side
    139,009.59x = 13,328,807,627.63
  5. Step 5: Solve for x
    x = 13,328,807,627.63/139,009.59
  6. Step 6: Final answer
    x = 95,884.09

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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.