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Finding the Fourth Proportional to 139,546.70, 209,170.98 and 64,579.58

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Solution

The fourth proportional to 139,546.70, 209,170.98 and 64,579.58 is: 96,800.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,546.70 : 209,170.98 = 64,579.58 : x
  2. Step 2: Convert to fraction form
    139,546.70/209,170.98 = 64,579.58/x
  3. Step 3: Cross multiply
    139,546.70x = 209,170.98 × 64,579.58
  4. Step 4: Simplify right side
    139,546.70x = 13,508,174,036.59
  5. Step 5: Solve for x
    x = 13,508,174,036.59/139,546.70
  6. Step 6: Final answer
    x = 96,800.38

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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.