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Finding the Fourth Proportional to 85,957.60, 128,968.80 and 41,623.60

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Solution

The fourth proportional to 85,957.60, 128,968.80 and 41,623.60 is: 62,451.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,957.60 : 128,968.80 = 41,623.60 : x
  2. Step 2: Convert to fraction form
    85,957.60/128,968.80 = 41,623.60/x
  3. Step 3: Cross multiply
    85,957.60x = 128,968.80 × 41,623.60
  4. Step 4: Simplify right side
    85,957.60x = 5,368,145,743.68
  5. Step 5: Solve for x
    x = 5,368,145,743.68/85,957.60
  6. Step 6: Final answer
    x = 62,451.09

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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.