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Finding the Fourth Proportional to 96,889.86, 133,653.87 and 90,039.78

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Solution

The fourth proportional to 96,889.86, 133,653.87 and 90,039.78 is: 124,204.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,889.86 : 133,653.87 = 90,039.78 : x
  2. Step 2: Convert to fraction form
    96,889.86/133,653.87 = 90,039.78/x
  3. Step 3: Cross multiply
    96,889.86x = 133,653.87 × 90,039.78
  4. Step 4: Simplify right side
    96,889.86x = 12,034,165,050.95
  5. Step 5: Solve for x
    x = 12,034,165,050.95/96,889.86
  6. Step 6: Final answer
    x = 124,204.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.