Home / 75,940.23-113,910.40-19,780.20

Finding the Fourth Proportional to 75,940.23, 113,910.40 and 19,780.20

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Solution

The fourth proportional to 75,940.23, 113,910.40 and 19,780.20 is: 29,670.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,940.23 : 113,910.40 = 19,780.20 : x
  2. Step 2: Convert to fraction form
    75,940.23/113,910.40 = 19,780.20/x
  3. Step 3: Cross multiply
    75,940.23x = 113,910.40 × 19,780.20
  4. Step 4: Simplify right side
    75,940.23x = 2,253,170,518.81
  5. Step 5: Solve for x
    x = 2,253,170,518.81/75,940.23
  6. Step 6: Final answer
    x = 29,670.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.