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Finding the Fourth Proportional to 103,689.22, 155,721.19 and 95,353.86

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Solution

The fourth proportional to 103,689.22, 155,721.19 and 95,353.86 is: 143,203.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689.22 : 155,721.19 = 95,353.86 : x
  2. Step 2: Convert to fraction form
    103,689.22/155,721.19 = 95,353.86/x
  3. Step 3: Cross multiply
    103,689.22x = 155,721.19 × 95,353.86
  4. Step 4: Simplify right side
    103,689.22x = 14,848,616,550.29
  5. Step 5: Solve for x
    x = 14,848,616,550.29/103,689.22
  6. Step 6: Final answer
    x = 143,203.09

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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.