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Finding the Fourth Proportional to 91,978.67, 126,965.26 and 53,750.67

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Solution

The fourth proportional to 91,978.67, 126,965.26 and 53,750.67 is: 74,196.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,978.67 : 126,965.26 = 53,750.67 : x
  2. Step 2: Convert to fraction form
    91,978.67/126,965.26 = 53,750.67/x
  3. Step 3: Cross multiply
    91,978.67x = 126,965.26 × 53,750.67
  4. Step 4: Simplify right side
    91,978.67x = 6,824,467,794.62
  5. Step 5: Solve for x
    x = 6,824,467,794.62/91,978.67
  6. Step 6: Final answer
    x = 74,196.20

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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.