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Finding the Fourth Proportional to 100,363.59, 138,491.78 and 57,935.79

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Solution

The fourth proportional to 100,363.59, 138,491.78 and 57,935.79 is: 79,945.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,363.59 : 138,491.78 = 57,935.79 : x
  2. Step 2: Convert to fraction form
    100,363.59/138,491.78 = 57,935.79/x
  3. Step 3: Cross multiply
    100,363.59x = 138,491.78 × 57,935.79
  4. Step 4: Simplify right side
    100,363.59x = 8,023,630,393.13
  5. Step 5: Solve for x
    x = 8,023,630,393.13/100,363.59
  6. Step 6: Final answer
    x = 79,945.63

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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.