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Finding the Fourth Proportional to 66,397.84, 99,596.60 and 20,809.04

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Solution

The fourth proportional to 66,397.84, 99,596.60 and 20,809.04 is: 31,213.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,397.84 : 99,596.60 = 20,809.04 : x
  2. Step 2: Convert to fraction form
    66,397.84/99,596.60 = 20,809.04/x
  3. Step 3: Cross multiply
    66,397.84x = 99,596.60 × 20,809.04
  4. Step 4: Simplify right side
    66,397.84x = 2,072,509,187.30
  5. Step 5: Solve for x
    x = 2,072,509,187.30/66,397.84
  6. Step 6: Final answer
    x = 31,213.50

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1.5x scale

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.