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Finding the Fourth Proportional to 68,078.55, 102,157.79 and 28,632.63

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Solution

The fourth proportional to 68,078.55, 102,157.79 and 28,632.63 is: 42,965.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,078.55 : 102,157.79 = 28,632.63 : x
  2. Step 2: Convert to fraction form
    68,078.55/102,157.79 = 28,632.63/x
  3. Step 3: Cross multiply
    68,078.55x = 102,157.79 × 28,632.63
  4. Step 4: Simplify right side
    68,078.55x = 2,925,046,059.52
  5. Step 5: Solve for x
    x = 2,925,046,059.52/68,078.55
  6. Step 6: Final answer
    x = 42,965.75

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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.