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Finding the Fourth Proportional to 81,807.46, 112,867.13 and 66,674.09

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Solution

The fourth proportional to 81,807.46, 112,867.13 and 66,674.09 is: 91,988.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,807.46 : 112,867.13 = 66,674.09 : x
  2. Step 2: Convert to fraction form
    81,807.46/112,867.13 = 66,674.09/x
  3. Step 3: Cross multiply
    81,807.46x = 112,867.13 × 66,674.09
  4. Step 4: Simplify right side
    81,807.46x = 7,525,313,632.51
  5. Step 5: Solve for x
    x = 7,525,313,632.51/81,807.46
  6. Step 6: Final answer
    x = 91,988.11

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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.