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Finding the Fourth Proportional to 100,650.57, 138,899.52 and 55,330.47

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Solution

The fourth proportional to 100,650.57, 138,899.52 and 55,330.47 is: 76,357.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,650.57 : 138,899.52 = 55,330.47 : x
  2. Step 2: Convert to fraction form
    100,650.57/138,899.52 = 55,330.47/x
  3. Step 3: Cross multiply
    100,650.57x = 138,899.52 × 55,330.47
  4. Step 4: Simplify right side
    100,650.57x = 7,685,375,724.37
  5. Step 5: Solve for x
    x = 7,685,375,724.37/100,650.57
  6. Step 6: Final answer
    x = 76,357.00

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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.