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Finding the Fourth Proportional to 104,641.10, 156,961.65 and 91,519.10

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Solution

The fourth proportional to 104,641.10, 156,961.65 and 91,519.10 is: 137,278.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,641.10 : 156,961.65 = 91,519.10 : x
  2. Step 2: Convert to fraction form
    104,641.10/156,961.65 = 91,519.10/x
  3. Step 3: Cross multiply
    104,641.10x = 156,961.65 × 91,519.10
  4. Step 4: Simplify right side
    104,641.10x = 14,364,988,942.52
  5. Step 5: Solve for x
    x = 14,364,988,942.52/104,641.10
  6. Step 6: Final answer
    x = 137,278.65

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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.