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Finding the Fourth Proportional to 85,892.40, 128,935.80 and 50,851.80

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Solution

The fourth proportional to 85,892.40, 128,935.80 and 50,851.80 is: 76,335.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,892.40 : 128,935.80 = 50,851.80 : x
  2. Step 2: Convert to fraction form
    85,892.40/128,935.80 = 50,851.80/x
  3. Step 3: Cross multiply
    85,892.40x = 128,935.80 × 50,851.80
  4. Step 4: Simplify right side
    85,892.40x = 6,556,617,514.44
  5. Step 5: Solve for x
    x = 6,556,617,514.44/85,892.40
  6. Step 6: Final answer
    x = 76,335.25

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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.