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Finding the Fourth Proportional to 103,960.72, 155,188.94 and 91,349.34

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Solution

The fourth proportional to 103,960.72, 155,188.94 and 91,349.34 is: 136,363.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,960.72 : 155,188.94 = 91,349.34 : x
  2. Step 2: Convert to fraction form
    103,960.72/155,188.94 = 91,349.34/x
  3. Step 3: Cross multiply
    103,960.72x = 155,188.94 × 91,349.34
  4. Step 4: Simplify right side
    103,960.72x = 14,176,407,244.30
  5. Step 5: Solve for x
    x = 14,176,407,244.30/103,960.72
  6. Step 6: Final answer
    x = 136,363.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.