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Finding the Fourth Proportional to 70,172.65, 105,196.57 and 25,789.03

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Solution

The fourth proportional to 70,172.65, 105,196.57 and 25,789.03 is: 38,660.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,172.65 : 105,196.57 = 25,789.03 : x
  2. Step 2: Convert to fraction form
    70,172.65/105,196.57 = 25,789.03/x
  3. Step 3: Cross multiply
    70,172.65x = 105,196.57 × 25,789.03
  4. Step 4: Simplify right side
    70,172.65x = 2,712,917,499.63
  5. Step 5: Solve for x
    x = 2,712,917,499.63/70,172.65
  6. Step 6: Final answer
    x = 38,660.61

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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.