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Finding the Fourth Proportional to 318,702.84, 478,083.48 and 82,046.28

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Solution

The fourth proportional to 318,702.84, 478,083.48 and 82,046.28 is: 123,076.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,702.84 : 478,083.48 = 82,046.28 : x
  2. Step 2: Convert to fraction form
    318,702.84/478,083.48 = 82,046.28/x
  3. Step 3: Cross multiply
    318,702.84x = 478,083.48 × 82,046.28
  4. Step 4: Simplify right side
    318,702.84x = 39,224,971,063.45
  5. Step 5: Solve for x
    x = 39,224,971,063.45/318,702.84
  6. Step 6: Final answer
    x = 123,076.94

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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.