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Finding the Fourth Proportional to 107,706.72, 161,309.28 and 103,969.92

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Solution

The fourth proportional to 107,706.72, 161,309.28 and 103,969.92 is: 155,712.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,706.72 : 161,309.28 = 103,969.92 : x
  2. Step 2: Convert to fraction form
    107,706.72/161,309.28 = 103,969.92/x
  3. Step 3: Cross multiply
    107,706.72x = 161,309.28 × 103,969.92
  4. Step 4: Simplify right side
    107,706.72x = 16,771,312,936.86
  5. Step 5: Solve for x
    x = 16,771,312,936.86/107,706.72
  6. Step 6: Final answer
    x = 155,712.78

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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.