Home / 100,575.63-138,822.30-57,579.21

Finding the Fourth Proportional to 100,575.63, 138,822.30 and 57,579.21

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Solution

The fourth proportional to 100,575.63, 138,822.30 and 57,579.21 is: 79,475.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,575.63 : 138,822.30 = 57,579.21 : x
  2. Step 2: Convert to fraction form
    100,575.63/138,822.30 = 57,579.21/x
  3. Step 3: Cross multiply
    100,575.63x = 138,822.30 × 57,579.21
  4. Step 4: Simplify right side
    100,575.63x = 7,993,278,364.38
  5. Step 5: Solve for x
    x = 7,993,278,364.38/100,575.63
  6. Step 6: Final answer
    x = 79,475.30

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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.