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Finding the Fourth Proportional to 106,960.40, 147,620.80 and 61,629.70

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Solution

The fourth proportional to 106,960.40, 147,620.80 and 61,629.70 is: 85,057.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,960.40 : 147,620.80 = 61,629.70 : x
  2. Step 2: Convert to fraction form
    106,960.40/147,620.80 = 61,629.70/x
  3. Step 3: Cross multiply
    106,960.40x = 147,620.80 × 61,629.70
  4. Step 4: Simplify right side
    106,960.40x = 9,097,825,617.76
  5. Step 5: Solve for x
    x = 9,097,825,617.76/106,960.40
  6. Step 6: Final answer
    x = 85,057.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.