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Finding the Fourth Proportional to 138,711.87, 208,018.58 and 49,941.54

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Solution

The fourth proportional to 138,711.87, 208,018.58 and 49,941.54 is: 74,894.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,711.87 : 208,018.58 = 49,941.54 : x
  2. Step 2: Convert to fraction form
    138,711.87/208,018.58 = 49,941.54/x
  3. Step 3: Cross multiply
    138,711.87x = 208,018.58 × 49,941.54
  4. Step 4: Simplify right side
    138,711.87x = 10,388,767,984.11
  5. Step 5: Solve for x
    x = 10,388,767,984.11/138,711.87
  6. Step 6: Final answer
    x = 74,894.59

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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.