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Finding the Fourth Proportional to 68,129, 94,030.98 and 38,321

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Solution

The fourth proportional to 68,129, 94,030.98 and 38,321 is: 52,890.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,129 : 94,030.98 = 38,321 : x
  2. Step 2: Convert to fraction form
    68,129/94,030.98 = 38,321/x
  3. Step 3: Cross multiply
    68,129x = 94,030.98 × 38,321
  4. Step 4: Simplify right side
    68,129x = 3,603,361,184.58
  5. Step 5: Solve for x
    x = 3,603,361,184.58/68,129
  6. Step 6: Final answer
    x = 52,890.27

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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.