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Finding the Fourth Proportional to 78,805.34, 118,141.47 and 36,663.66

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Solution

The fourth proportional to 78,805.34, 118,141.47 and 36,663.66 is: 54,964.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,805.34 : 118,141.47 = 36,663.66 : x
  2. Step 2: Convert to fraction form
    78,805.34/118,141.47 = 36,663.66/x
  3. Step 3: Cross multiply
    78,805.34x = 118,141.47 × 36,663.66
  4. Step 4: Simplify right side
    78,805.34x = 4,331,498,687.98
  5. Step 5: Solve for x
    x = 4,331,498,687.98/78,805.34
  6. Step 6: Final answer
    x = 54,964.54

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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.