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Finding the Fourth Proportional to 91,938, 126,885.36 and 51,651.84

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Solution

The fourth proportional to 91,938, 126,885.36 and 51,651.84 is: 71,285.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,938 : 126,885.36 = 51,651.84 : x
  2. Step 2: Convert to fraction form
    91,938/126,885.36 = 51,651.84/x
  3. Step 3: Cross multiply
    91,938x = 126,885.36 × 51,651.84
  4. Step 4: Simplify right side
    91,938x = 6,553,862,313.06
  5. Step 5: Solve for x
    x = 6,553,862,313.06/91,938
  6. Step 6: Final answer
    x = 71,285.67

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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.