Home / 91,278.43-136,930.70-28,103.90

Finding the Fourth Proportional to 91,278.43, 136,930.70 and 28,103.90

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Solution

The fourth proportional to 91,278.43, 136,930.70 and 28,103.90 is: 42,159.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,278.43 : 136,930.70 = 28,103.90 : x
  2. Step 2: Convert to fraction form
    91,278.43/136,930.70 = 28,103.90/x
  3. Step 3: Cross multiply
    91,278.43x = 136,930.70 × 28,103.90
  4. Step 4: Simplify right side
    91,278.43x = 3,848,286,085.34
  5. Step 5: Solve for x
    x = 3,848,286,085.34/91,278.43
  6. Step 6: Final answer
    x = 42,159.86

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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.