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Finding the Fourth Proportional to 104,646.60, 156,969.90 and 69,217.20

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Solution

The fourth proportional to 104,646.60, 156,969.90 and 69,217.20 is: 103,825.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,646.60 : 156,969.90 = 69,217.20 : x
  2. Step 2: Convert to fraction form
    104,646.60/156,969.90 = 69,217.20/x
  3. Step 3: Cross multiply
    104,646.60x = 156,969.90 × 69,217.20
  4. Step 4: Simplify right side
    104,646.60x = 10,865,016,962.28
  5. Step 5: Solve for x
    x = 10,865,016,962.28/104,646.60
  6. Step 6: Final answer
    x = 103,825.80

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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.