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Finding the Fourth Proportional to 145,164.69, 217,636.29 and 66,223.71

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Solution

The fourth proportional to 145,164.69, 217,636.29 and 66,223.71 is: 99,285.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,164.69 : 217,636.29 = 66,223.71 : x
  2. Step 2: Convert to fraction form
    145,164.69/217,636.29 = 66,223.71/x
  3. Step 3: Cross multiply
    145,164.69x = 217,636.29 × 66,223.71
  4. Step 4: Simplify right side
    145,164.69x = 14,412,682,554.44
  5. Step 5: Solve for x
    x = 14,412,682,554.44/145,164.69
  6. Step 6: Final answer
    x = 99,285.04

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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.