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Finding the Fourth Proportional to 100,703.59, 138,971.83 and 54,763.39

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Solution

The fourth proportional to 100,703.59, 138,971.83 and 54,763.39 is: 75,573.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,703.59 : 138,971.83 = 54,763.39 : x
  2. Step 2: Convert to fraction form
    100,703.59/138,971.83 = 54,763.39/x
  3. Step 3: Cross multiply
    100,703.59x = 138,971.83 × 54,763.39
  4. Step 4: Simplify right side
    100,703.59x = 7,610,568,525.30
  5. Step 5: Solve for x
    x = 7,610,568,525.30/100,703.59
  6. Step 6: Final answer
    x = 75,573.95

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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.