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Finding the Fourth Proportional to 71,619.40, 107,429.10 and 71,619.40

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Solution

The fourth proportional to 71,619.40, 107,429.10 and 71,619.40 is: 107,429.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,619.40 : 107,429.10 = 71,619.40 : x
  2. Step 2: Convert to fraction form
    71,619.40/107,429.10 = 71,619.40/x
  3. Step 3: Cross multiply
    71,619.40x = 107,429.10 × 71,619.40
  4. Step 4: Simplify right side
    71,619.40x = 7,694,007,684.54
  5. Step 5: Solve for x
    x = 7,694,007,684.54/71,619.40
  6. Step 6: Final answer
    x = 107,429.10

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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.