Home / 100,000.12-138,034.89-57,575.56

Finding the Fourth Proportional to 100,000.12, 138,034.89 and 57,575.56

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Solution

The fourth proportional to 100,000.12, 138,034.89 and 57,575.56 is: 79,474.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,000.12 : 138,034.89 = 57,575.56 : x
  2. Step 2: Convert to fraction form
    100,000.12/138,034.89 = 57,575.56/x
  3. Step 3: Cross multiply
    100,000.12x = 138,034.89 × 57,575.56
  4. Step 4: Simplify right side
    100,000.12x = 7,947,436,091.29
  5. Step 5: Solve for x
    x = 7,947,436,091.29/100,000.12
  6. Step 6: Final answer
    x = 79,474.27

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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.