Home / 100,043.16-138,063.39-57,029.42

Finding the Fourth Proportional to 100,043.16, 138,063.39 and 57,029.42

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Solution

The fourth proportional to 100,043.16, 138,063.39 and 57,029.42 is: 78,702.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,043.16 : 138,063.39 = 57,029.42 : x
  2. Step 2: Convert to fraction form
    100,043.16/138,063.39 = 57,029.42/x
  3. Step 3: Cross multiply
    100,043.16x = 138,063.39 × 57,029.42
  4. Step 4: Simplify right side
    100,043.16x = 7,873,675,400.09
  5. Step 5: Solve for x
    x = 7,873,675,400.09/100,043.16
  6. Step 6: Final answer
    x = 78,702.79

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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.