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Finding the Fourth Proportional to 139,415.92, 209,123.44 and 39,576.20

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Solution

The fourth proportional to 139,415.92, 209,123.44 and 39,576.20 is: 59,364.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,415.92 : 209,123.44 = 39,576.20 : x
  2. Step 2: Convert to fraction form
    139,415.92/209,123.44 = 39,576.20/x
  3. Step 3: Cross multiply
    139,415.92x = 209,123.44 × 39,576.20
  4. Step 4: Simplify right side
    139,415.92x = 8,276,309,941.57
  5. Step 5: Solve for x
    x = 8,276,309,941.57/139,415.92
  6. Step 6: Final answer
    x = 59,364.17

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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.