Home / 77,083.20-115,538.40-39,628.80

Finding the Fourth Proportional to 77,083.20, 115,538.40 and 39,628.80

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Solution

The fourth proportional to 77,083.20, 115,538.40 and 39,628.80 is: 59,398.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,083.20 : 115,538.40 = 39,628.80 : x
  2. Step 2: Convert to fraction form
    77,083.20/115,538.40 = 39,628.80/x
  3. Step 3: Cross multiply
    77,083.20x = 115,538.40 × 39,628.80
  4. Step 4: Simplify right side
    77,083.20x = 4,578,648,145.92
  5. Step 5: Solve for x
    x = 4,578,648,145.92/77,083.20
  6. Step 6: Final answer
    x = 59,398.78

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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.