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Finding the Fourth Proportional to 91,984.95, 126,940.32 and 55,685.88

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Solution

The fourth proportional to 91,984.95, 126,940.32 and 55,685.88 is: 76,847.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,984.95 : 126,940.32 = 55,685.88 : x
  2. Step 2: Convert to fraction form
    91,984.95/126,940.32 = 55,685.88/x
  3. Step 3: Cross multiply
    91,984.95x = 126,940.32 × 55,685.88
  4. Step 4: Simplify right side
    91,984.95x = 7,068,783,426.68
  5. Step 5: Solve for x
    x = 7,068,783,426.68/91,984.95
  6. Step 6: Final answer
    x = 76,847.17

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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.