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Finding the Fourth Proportional to 78,664.98, 118,035.54 and 39,227.70

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Solution

The fourth proportional to 78,664.98, 118,035.54 and 39,227.70 is: 58,860.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,664.98 : 118,035.54 = 39,227.70 : x
  2. Step 2: Convert to fraction form
    78,664.98/118,035.54 = 39,227.70/x
  3. Step 3: Cross multiply
    78,664.98x = 118,035.54 × 39,227.70
  4. Step 4: Simplify right side
    78,664.98x = 4,630,262,752.46
  5. Step 5: Solve for x
    x = 4,630,262,752.46/78,664.98
  6. Step 6: Final answer
    x = 58,860.53

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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.