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Finding the Fourth Proportional to 100,263.70, 138,367.39 and 54,945.64

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Solution

The fourth proportional to 100,263.70, 138,367.39 and 54,945.64 is: 75,826.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,263.70 : 138,367.39 = 54,945.64 : x
  2. Step 2: Convert to fraction form
    100,263.70/138,367.39 = 54,945.64/x
  3. Step 3: Cross multiply
    100,263.70x = 138,367.39 × 54,945.64
  4. Step 4: Simplify right side
    100,263.70x = 7,602,684,937.30
  5. Step 5: Solve for x
    x = 7,602,684,937.30/100,263.70
  6. Step 6: Final answer
    x = 75,826.90

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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.