Home / 81,560.77-112,496.92-78,817.53

Finding the Fourth Proportional to 81,560.77, 112,496.92 and 78,817.53

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Solution

The fourth proportional to 81,560.77, 112,496.92 and 78,817.53 is: 108,713.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,560.77 : 112,496.92 = 78,817.53 : x
  2. Step 2: Convert to fraction form
    81,560.77/112,496.92 = 78,817.53/x
  3. Step 3: Cross multiply
    81,560.77x = 112,496.92 × 78,817.53
  4. Step 4: Simplify right side
    81,560.77x = 8,866,729,367.01
  5. Step 5: Solve for x
    x = 8,866,729,367.01/81,560.77
  6. Step 6: Final answer
    x = 108,713.16

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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.