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Finding the Fourth Proportional to 68,613.40, 102,920.10 and 67,957.30

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Solution

The fourth proportional to 68,613.40, 102,920.10 and 67,957.30 is: 101,935.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,613.40 : 102,920.10 = 67,957.30 : x
  2. Step 2: Convert to fraction form
    68,613.40/102,920.10 = 67,957.30/x
  3. Step 3: Cross multiply
    68,613.40x = 102,920.10 × 67,957.30
  4. Step 4: Simplify right side
    68,613.40x = 6,994,172,111.73
  5. Step 5: Solve for x
    x = 6,994,172,111.73/68,613.40
  6. Step 6: Final answer
    x = 101,935.95

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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.