Home / 100,419.24-138,537.06-57,947.64

Finding the Fourth Proportional to 100,419.24, 138,537.06 and 57,947.64

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Solution

The fourth proportional to 100,419.24, 138,537.06 and 57,947.64 is: 79,943.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,419.24 : 138,537.06 = 57,947.64 : x
  2. Step 2: Convert to fraction form
    100,419.24/138,537.06 = 57,947.64/x
  3. Step 3: Cross multiply
    100,419.24x = 138,537.06 × 57,947.64
  4. Step 4: Simplify right side
    100,419.24x = 8,027,895,679.54
  5. Step 5: Solve for x
    x = 8,027,895,679.54/100,419.24
  6. Step 6: Final answer
    x = 79,943.80

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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.