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Finding the Fourth Proportional to 66,648.48, 91,915.29 and 55,299.99

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Solution

The fourth proportional to 66,648.48, 91,915.29 and 55,299.99 is: 76,264.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,648.48 : 91,915.29 = 55,299.99 : x
  2. Step 2: Convert to fraction form
    66,648.48/91,915.29 = 55,299.99/x
  3. Step 3: Cross multiply
    66,648.48x = 91,915.29 × 55,299.99
  4. Step 4: Simplify right side
    66,648.48x = 5,082,914,617.85
  5. Step 5: Solve for x
    x = 5,082,914,617.85/66,648.48
  6. Step 6: Final answer
    x = 76,264.52

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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.