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Finding the Fourth Proportional to 91,369.58, 126,128.88 and 55,571.09

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Solution

The fourth proportional to 91,369.58, 126,128.88 and 55,571.09 is: 76,711.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,369.58 : 126,128.88 = 55,571.09 : x
  2. Step 2: Convert to fraction form
    91,369.58/126,128.88 = 55,571.09/x
  3. Step 3: Cross multiply
    91,369.58x = 126,128.88 × 55,571.09
  4. Step 4: Simplify right side
    91,369.58x = 7,009,118,711.43
  5. Step 5: Solve for x
    x = 7,009,118,711.43/91,369.58
  6. Step 6: Final answer
    x = 76,711.74

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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.