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Finding the Fourth Proportional to 103,951.41, 155,175.16 and 91,340.09

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Solution

The fourth proportional to 103,951.41, 155,175.16 and 91,340.09 is: 136,349.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,951.41 : 155,175.16 = 91,340.09 : x
  2. Step 2: Convert to fraction form
    103,951.41/155,175.16 = 91,340.09/x
  3. Step 3: Cross multiply
    103,951.41x = 155,175.16 × 91,340.09
  4. Step 4: Simplify right side
    103,951.41x = 14,173,713,080.16
  5. Step 5: Solve for x
    x = 14,173,713,080.16/103,951.41
  6. Step 6: Final answer
    x = 136,349.41

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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.