Home / 77,382.24-115,555.80-66,171.84

Finding the Fourth Proportional to 77,382.24, 115,555.80 and 66,171.84

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Solution

The fourth proportional to 77,382.24, 115,555.80 and 66,171.84 is: 98,815.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,382.24 : 115,555.80 = 66,171.84 : x
  2. Step 2: Convert to fraction form
    77,382.24/115,555.80 = 66,171.84/x
  3. Step 3: Cross multiply
    77,382.24x = 115,555.80 × 66,171.84
  4. Step 4: Simplify right side
    77,382.24x = 7,646,539,908.67
  5. Step 5: Solve for x
    x = 7,646,539,908.67/77,382.24
  6. Step 6: Final answer
    x = 98,815.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.