Home / 81,133.32-121,685.94-21,955.17

Finding the Fourth Proportional to 81,133.32, 121,685.94 and 21,955.17

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Solution

The fourth proportional to 81,133.32, 121,685.94 and 21,955.17 is: 32,928.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,133.32 : 121,685.94 = 21,955.17 : x
  2. Step 2: Convert to fraction form
    81,133.32/121,685.94 = 21,955.17/x
  3. Step 3: Cross multiply
    81,133.32x = 121,685.94 × 21,955.17
  4. Step 4: Simplify right side
    81,133.32x = 2,671,635,499.31
  5. Step 5: Solve for x
    x = 2,671,635,499.31/81,133.32
  6. Step 6: Final answer
    x = 32,928.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.