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Finding the Fourth Proportional to 73,139.70, 109,709.54 and 25,743.63

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Solution

The fourth proportional to 73,139.70, 109,709.54 and 25,743.63 is: 38,615.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,139.70 : 109,709.54 = 25,743.63 : x
  2. Step 2: Convert to fraction form
    73,139.70/109,709.54 = 25,743.63/x
  3. Step 3: Cross multiply
    73,139.70x = 109,709.54 × 25,743.63
  4. Step 4: Simplify right side
    73,139.70x = 2,824,321,676.51
  5. Step 5: Solve for x
    x = 2,824,321,676.51/73,139.70
  6. Step 6: Final answer
    x = 38,615.44

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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.