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Finding the Fourth Proportional to 91,918.36, 126,895.50 and 61,861.72

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Solution

The fourth proportional to 91,918.36, 126,895.50 and 61,861.72 is: 85,401.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,918.36 : 126,895.50 = 61,861.72 : x
  2. Step 2: Convert to fraction form
    91,918.36/126,895.50 = 61,861.72/x
  3. Step 3: Cross multiply
    91,918.36x = 126,895.50 × 61,861.72
  4. Step 4: Simplify right side
    91,918.36x = 7,849,973,890.26
  5. Step 5: Solve for x
    x = 7,849,973,890.26/91,918.36
  6. Step 6: Final answer
    x = 85,401.59

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