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Finding the Fourth Proportional to 75,287.20, 112,930.80 and 43,664.80

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Solution

The fourth proportional to 75,287.20, 112,930.80 and 43,664.80 is: 65,497.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,287.20 : 112,930.80 = 43,664.80 : x
  2. Step 2: Convert to fraction form
    75,287.20/112,930.80 = 43,664.80/x
  3. Step 3: Cross multiply
    75,287.20x = 112,930.80 × 43,664.80
  4. Step 4: Simplify right side
    75,287.20x = 4,931,100,795.84
  5. Step 5: Solve for x
    x = 4,931,100,795.84/75,287.20
  6. Step 6: Final answer
    x = 65,497.20

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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.