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Finding the Fourth Proportional to 139,073.79, 208,619.49 and 53,725.35

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Solution

The fourth proportional to 139,073.79, 208,619.49 and 53,725.35 is: 80,591.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,073.79 : 208,619.49 = 53,725.35 : x
  2. Step 2: Convert to fraction form
    139,073.79/208,619.49 = 53,725.35/x
  3. Step 3: Cross multiply
    139,073.79x = 208,619.49 × 53,725.35
  4. Step 4: Simplify right side
    139,073.79x = 11,208,155,117.07
  5. Step 5: Solve for x
    x = 11,208,155,117.07/139,073.79
  6. Step 6: Final answer
    x = 80,591.43

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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.