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Finding the Fourth Proportional to 68,651.49, 102,957.35 and 20,618.16

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Solution

The fourth proportional to 68,651.49, 102,957.35 and 20,618.16 is: 30,921.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,651.49 : 102,957.35 = 20,618.16 : x
  2. Step 2: Convert to fraction form
    68,651.49/102,957.35 = 20,618.16/x
  3. Step 3: Cross multiply
    68,651.49x = 102,957.35 × 20,618.16
  4. Step 4: Simplify right side
    68,651.49x = 2,122,791,115.48
  5. Step 5: Solve for x
    x = 2,122,791,115.48/68,651.49
  6. Step 6: Final answer
    x = 30,921.27

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1.5x scale

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.