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Finding the Fourth Proportional to 118,664.80, 177,997.20 and 72,008.80

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Solution

The fourth proportional to 118,664.80, 177,997.20 and 72,008.80 is: 108,013.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,664.80 : 177,997.20 = 72,008.80 : x
  2. Step 2: Convert to fraction form
    118,664.80/177,997.20 = 72,008.80/x
  3. Step 3: Cross multiply
    118,664.80x = 177,997.20 × 72,008.80
  4. Step 4: Simplify right side
    118,664.80x = 12,817,364,775.36
  5. Step 5: Solve for x
    x = 12,817,364,775.36/118,664.80
  6. Step 6: Final answer
    x = 108,013.20

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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.