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Finding the Fourth Proportional to 68,820.60, 102,680.08 and 61,336.20

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Solution

The fourth proportional to 68,820.60, 102,680.08 and 61,336.20 is: 91,513.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,820.60 : 102,680.08 = 61,336.20 : x
  2. Step 2: Convert to fraction form
    68,820.60/102,680.08 = 61,336.20/x
  3. Step 3: Cross multiply
    68,820.60x = 102,680.08 × 61,336.20
  4. Step 4: Simplify right side
    68,820.60x = 6,298,005,922.90
  5. Step 5: Solve for x
    x = 6,298,005,922.90/68,820.60
  6. Step 6: Final answer
    x = 91,513.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.