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Finding the Fourth Proportional to 68,636.64, 102,970.08 and 39,068.40

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Solution

The fourth proportional to 68,636.64, 102,970.08 and 39,068.40 is: 58,611.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,636.64 : 102,970.08 = 39,068.40 : x
  2. Step 2: Convert to fraction form
    68,636.64/102,970.08 = 39,068.40/x
  3. Step 3: Cross multiply
    68,636.64x = 102,970.08 × 39,068.40
  4. Step 4: Simplify right side
    68,636.64x = 4,022,876,273.47
  5. Step 5: Solve for x
    x = 4,022,876,273.47/68,636.64
  6. Step 6: Final answer
    x = 58,611.21

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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.