Home / 81,980.20-113,184.91-66,908.81

Finding the Fourth Proportional to 81,980.20, 113,184.91 and 66,908.81

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Solution

The fourth proportional to 81,980.20, 113,184.91 and 66,908.81 is: 92,376.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,980.20 : 113,184.91 = 66,908.81 : x
  2. Step 2: Convert to fraction form
    81,980.20/113,184.91 = 66,908.81/x
  3. Step 3: Cross multiply
    81,980.20x = 113,184.91 × 66,908.81
  4. Step 4: Simplify right side
    81,980.20x = 7,573,067,686.32
  5. Step 5: Solve for x
    x = 7,573,067,686.32/81,980.20
  6. Step 6: Final answer
    x = 92,376.79

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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.