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Finding the Fourth Proportional to 100,650.63, 138,898.17 and 55,332.51

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Solution

The fourth proportional to 100,650.63, 138,898.17 and 55,332.51 is: 76,359.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,650.63 : 138,898.17 = 55,332.51 : x
  2. Step 2: Convert to fraction form
    100,650.63/138,898.17 = 55,332.51/x
  3. Step 3: Cross multiply
    100,650.63x = 138,898.17 × 55,332.51
  4. Step 4: Simplify right side
    100,650.63x = 7,685,584,380.51
  5. Step 5: Solve for x
    x = 7,685,584,380.51/100,650.63
  6. Step 6: Final answer
    x = 76,359.03

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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.