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Finding the Fourth Proportional to 78,525.71, 117,786.74 and 25,217.58

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Solution

The fourth proportional to 78,525.71, 117,786.74 and 25,217.58 is: 37,825.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,525.71 : 117,786.74 = 25,217.58 : x
  2. Step 2: Convert to fraction form
    78,525.71/117,786.74 = 25,217.58/x
  3. Step 3: Cross multiply
    78,525.71x = 117,786.74 × 25,217.58
  4. Step 4: Simplify right side
    78,525.71x = 2,970,296,538.89
  5. Step 5: Solve for x
    x = 2,970,296,538.89/78,525.71
  6. Step 6: Final answer
    x = 37,825.78

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1.5x scale

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.