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Finding the Fourth Proportional to 100,090.71, 138,121.07 and 59,826.68

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Solution

The fourth proportional to 100,090.71, 138,121.07 and 59,826.68 is: 82,558.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,090.71 : 138,121.07 = 59,826.68 : x
  2. Step 2: Convert to fraction form
    100,090.71/138,121.07 = 59,826.68/x
  3. Step 3: Cross multiply
    100,090.71x = 138,121.07 × 59,826.68
  4. Step 4: Simplify right side
    100,090.71x = 8,263,324,322.09
  5. Step 5: Solve for x
    x = 8,263,324,322.09/100,090.71
  6. Step 6: Final answer
    x = 82,558.35

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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.