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Finding the Fourth Proportional to 72,805.34, 100,502.36 and 48,945.85

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Solution

The fourth proportional to 72,805.34, 100,502.36 and 48,945.85 is: 67,566.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,805.34 : 100,502.36 = 48,945.85 : x
  2. Step 2: Convert to fraction form
    72,805.34/100,502.36 = 48,945.85/x
  3. Step 3: Cross multiply
    72,805.34x = 100,502.36 × 48,945.85
  4. Step 4: Simplify right side
    72,805.34x = 4,919,173,308.31
  5. Step 5: Solve for x
    x = 4,919,173,308.31/72,805.34
  6. Step 6: Final answer
    x = 67,566.11

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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.