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Finding the Fourth Proportional to 68,068.30, 93,920.48 and 39,768.52

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Solution

The fourth proportional to 68,068.30, 93,920.48 and 39,768.52 is: 54,872.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,068.30 : 93,920.48 = 39,768.52 : x
  2. Step 2: Convert to fraction form
    68,068.30/93,920.48 = 39,768.52/x
  3. Step 3: Cross multiply
    68,068.30x = 93,920.48 × 39,768.52
  4. Step 4: Simplify right side
    68,068.30x = 3,735,078,487.29
  5. Step 5: Solve for x
    x = 3,735,078,487.29/68,068.30
  6. Step 6: Final answer
    x = 54,872.51

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1.5x scale

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.