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Finding the Fourth Proportional to 117,043.38, 175,103.15 and 90,185.90

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Solution

The fourth proportional to 117,043.38, 175,103.15 and 90,185.90 is: 134,922.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,043.38 : 175,103.15 = 90,185.90 : x
  2. Step 2: Convert to fraction form
    117,043.38/175,103.15 = 90,185.90/x
  3. Step 3: Cross multiply
    117,043.38x = 175,103.15 × 90,185.90
  4. Step 4: Simplify right side
    117,043.38x = 15,791,833,849.14
  5. Step 5: Solve for x
    x = 15,791,833,849.14/117,043.38
  6. Step 6: Final answer
    x = 134,922.91

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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.