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Finding the Fourth Proportional to 68,136, 94,029.12 and 38,328

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Solution

The fourth proportional to 68,136, 94,029.12 and 38,328 is: 52,893.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,136 : 94,029.12 = 38,328 : x
  2. Step 2: Convert to fraction form
    68,136/94,029.12 = 38,328/x
  3. Step 3: Cross multiply
    68,136x = 94,029.12 × 38,328
  4. Step 4: Simplify right side
    68,136x = 3,603,948,111.36
  5. Step 5: Solve for x
    x = 3,603,948,111.36/68,136
  6. Step 6: Final answer
    x = 52,893.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.