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Finding the Fourth Proportional to 101,809.72, 140,579.96 and 63,613.76

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Solution

The fourth proportional to 101,809.72, 140,579.96 and 63,613.76 is: 87,838.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,809.72 : 140,579.96 = 63,613.76 : x
  2. Step 2: Convert to fraction form
    101,809.72/140,579.96 = 63,613.76/x
  3. Step 3: Cross multiply
    101,809.72x = 140,579.96 × 63,613.76
  4. Step 4: Simplify right side
    101,809.72x = 8,942,819,836.25
  5. Step 5: Solve for x
    x = 8,942,819,836.25/101,809.72
  6. Step 6: Final answer
    x = 87,838.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.