Home / 81,207.87-112,064.13-57,043.83

Finding the Fourth Proportional to 81,207.87, 112,064.13 and 57,043.83

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Solution

The fourth proportional to 81,207.87, 112,064.13 and 57,043.83 is: 78,718.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,207.87 : 112,064.13 = 57,043.83 : x
  2. Step 2: Convert to fraction form
    81,207.87/112,064.13 = 57,043.83/x
  3. Step 3: Cross multiply
    81,207.87x = 112,064.13 × 57,043.83
  4. Step 4: Simplify right side
    81,207.87x = 6,392,567,180.82
  5. Step 5: Solve for x
    x = 6,392,567,180.82/81,207.87
  6. Step 6: Final answer
    x = 78,718.57

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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.