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Finding the Fourth Proportional to 103,985.60, 156,016.80 and 100,145.60

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Solution

The fourth proportional to 103,985.60, 156,016.80 and 100,145.60 is: 150,255.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,985.60 : 156,016.80 = 100,145.60 : x
  2. Step 2: Convert to fraction form
    103,985.60/156,016.80 = 100,145.60/x
  3. Step 3: Cross multiply
    103,985.60x = 156,016.80 × 100,145.60
  4. Step 4: Simplify right side
    103,985.60x = 15,624,396,046.08
  5. Step 5: Solve for x
    x = 15,624,396,046.08/103,985.60
  6. Step 6: Final answer
    x = 150,255.38

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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.