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Finding the Fourth Proportional to 70,157.87, 105,171.19 and 25,772.70

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Solution

The fourth proportional to 70,157.87, 105,171.19 and 25,772.70 is: 38,634.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,157.87 : 105,171.19 = 25,772.70 : x
  2. Step 2: Convert to fraction form
    70,157.87/105,171.19 = 25,772.70/x
  3. Step 3: Cross multiply
    70,157.87x = 105,171.19 × 25,772.70
  4. Step 4: Simplify right side
    70,157.87x = 2,710,545,464.08
  5. Step 5: Solve for x
    x = 2,710,545,464.08/70,157.87
  6. Step 6: Final answer
    x = 38,634.95

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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.