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Finding the Fourth Proportional to 66,209.50, 99,315.16 and 36,685

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Solution

The fourth proportional to 66,209.50, 99,315.16 and 36,685 is: 55,028.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,209.50 : 99,315.16 = 36,685 : x
  2. Step 2: Convert to fraction form
    66,209.50/99,315.16 = 36,685/x
  3. Step 3: Cross multiply
    66,209.50x = 99,315.16 × 36,685
  4. Step 4: Simplify right side
    66,209.50x = 3,643,376,644.60
  5. Step 5: Solve for x
    x = 3,643,376,644.60/66,209.50
  6. Step 6: Final answer
    x = 55,028.00

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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.