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Finding the Fourth Proportional to 100,649.67, 138,898.27 and 55,329.56

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Solution

The fourth proportional to 100,649.67, 138,898.27 and 55,329.56 is: 76,355.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,649.67 : 138,898.27 = 55,329.56 : x
  2. Step 2: Convert to fraction form
    100,649.67/138,898.27 = 55,329.56/x
  3. Step 3: Cross multiply
    100,649.67x = 138,898.27 × 55,329.56
  4. Step 4: Simplify right side
    100,649.67x = 7,685,180,163.86
  5. Step 5: Solve for x
    x = 7,685,180,163.86/100,649.67
  6. Step 6: Final answer
    x = 76,355.74

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1.5x scale

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.