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Finding the Fourth Proportional to 103,959.57, 155,187.27 and 91,348.21

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Solution

The fourth proportional to 103,959.57, 155,187.27 and 91,348.21 is: 136,361.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,959.57 : 155,187.27 = 91,348.21 : x
  2. Step 2: Convert to fraction form
    103,959.57/155,187.27 = 91,348.21/x
  3. Step 3: Cross multiply
    103,959.57x = 155,187.27 × 91,348.21
  4. Step 4: Simplify right side
    103,959.57x = 14,176,079,329.29
  5. Step 5: Solve for x
    x = 14,176,079,329.29/103,959.57
  6. Step 6: Final answer
    x = 136,361.47

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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.