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Finding the Fourth Proportional to 104,196.65, 156,128.89 and 66,725.90

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Solution

The fourth proportional to 104,196.65, 156,128.89 and 66,725.90 is: 99,982.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,196.65 : 156,128.89 = 66,725.90 : x
  2. Step 2: Convert to fraction form
    104,196.65/156,128.89 = 66,725.90/x
  3. Step 3: Cross multiply
    104,196.65x = 156,128.89 × 66,725.90
  4. Step 4: Simplify right side
    104,196.65x = 10,417,840,701.25
  5. Step 5: Solve for x
    x = 10,417,840,701.25/104,196.65
  6. Step 6: Final answer
    x = 99,982.49

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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.