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Finding the Fourth Proportional to 103,959.72, 155,187.45 and 91,348.34

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Solution

The fourth proportional to 103,959.72, 155,187.45 and 91,348.34 is: 136,361.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,959.72 : 155,187.45 = 91,348.34 : x
  2. Step 2: Convert to fraction form
    103,959.72/155,187.45 = 91,348.34/x
  3. Step 3: Cross multiply
    103,959.72x = 155,187.45 × 91,348.34
  4. Step 4: Simplify right side
    103,959.72x = 14,176,115,170.40
  5. Step 5: Solve for x
    x = 14,176,115,170.40/103,959.72
  6. Step 6: Final answer
    x = 136,361.61

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1.5x scale

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.