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Finding the Fourth Proportional to 66,315.90, 99,474.89 and 36,920.57

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Solution

The fourth proportional to 66,315.90, 99,474.89 and 36,920.57 is: 55,381.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,315.90 : 99,474.89 = 36,920.57 : x
  2. Step 2: Convert to fraction form
    66,315.90/99,474.89 = 36,920.57/x
  3. Step 3: Cross multiply
    66,315.90x = 99,474.89 × 36,920.57
  4. Step 4: Simplify right side
    66,315.90x = 3,672,669,639.49
  5. Step 5: Solve for x
    x = 3,672,669,639.49/66,315.90
  6. Step 6: Final answer
    x = 55,381.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.