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Finding the Fourth Proportional to 45,472.84, 68,118.54 and 36,128.68

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Solution

The fourth proportional to 45,472.84, 68,118.54 and 36,128.68 is: 54,120.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,472.84 : 68,118.54 = 36,128.68 : x
  2. Step 2: Convert to fraction form
    45,472.84/68,118.54 = 36,128.68/x
  3. Step 3: Cross multiply
    45,472.84x = 68,118.54 × 36,128.68
  4. Step 4: Simplify right side
    45,472.84x = 2,461,032,933.73
  5. Step 5: Solve for x
    x = 2,461,032,933.73/45,472.84
  6. Step 6: Final answer
    x = 54,120.94

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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.