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Finding the Fourth Proportional to 85,934.40, 128,998.80 and 50,893.80

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Solution

The fourth proportional to 85,934.40, 128,998.80 and 50,893.80 is: 76,398.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,934.40 : 128,998.80 = 50,893.80 : x
  2. Step 2: Convert to fraction form
    85,934.40/128,998.80 = 50,893.80/x
  3. Step 3: Cross multiply
    85,934.40x = 128,998.80 × 50,893.80
  4. Step 4: Simplify right side
    85,934.40x = 6,565,239,127.44
  5. Step 5: Solve for x
    x = 6,565,239,127.44/85,934.40
  6. Step 6: Final answer
    x = 76,398.27

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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.