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Finding the Fourth Proportional to 104,200.96, 156,336 and 69,278.08

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Solution

The fourth proportional to 104,200.96, 156,336 and 69,278.08 is: 103,940.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,200.96 : 156,336 = 69,278.08 : x
  2. Step 2: Convert to fraction form
    104,200.96/156,336 = 69,278.08/x
  3. Step 3: Cross multiply
    104,200.96x = 156,336 × 69,278.08
  4. Step 4: Simplify right side
    104,200.96x = 10,830,657,914.88
  5. Step 5: Solve for x
    x = 10,830,657,914.88/104,200.96
  6. Step 6: Final answer
    x = 103,940.10

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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.