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Finding the Fourth Proportional to 139,368.40, 209,321.40 and 119,422.96

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Solution

The fourth proportional to 139,368.40, 209,321.40 and 119,422.96 is: 179,364.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,368.40 : 209,321.40 = 119,422.96 : x
  2. Step 2: Convert to fraction form
    139,368.40/209,321.40 = 119,422.96/x
  3. Step 3: Cross multiply
    139,368.40x = 209,321.40 × 119,422.96
  4. Step 4: Simplify right side
    139,368.40x = 24,997,781,179.34
  5. Step 5: Solve for x
    x = 24,997,781,179.34/139,368.40
  6. Step 6: Final answer
    x = 179,364.77

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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.