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Finding the Fourth Proportional to 139,409.52, 208,996.70 and 60,464.29

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Solution

The fourth proportional to 139,409.52, 208,996.70 and 60,464.29 is: 90,645.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,409.52 : 208,996.70 = 60,464.29 : x
  2. Step 2: Convert to fraction form
    139,409.52/208,996.70 = 60,464.29/x
  3. Step 3: Cross multiply
    139,409.52x = 208,996.70 × 60,464.29
  4. Step 4: Simplify right side
    139,409.52x = 12,636,837,077.84
  5. Step 5: Solve for x
    x = 12,636,837,077.84/139,409.52
  6. Step 6: Final answer
    x = 90,645.44

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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.