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Finding the Fourth Proportional to 103,494.60, 155,241.90 and 85,998.60

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Solution

The fourth proportional to 103,494.60, 155,241.90 and 85,998.60 is: 128,997.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,494.60 : 155,241.90 = 85,998.60 : x
  2. Step 2: Convert to fraction form
    103,494.60/155,241.90 = 85,998.60/x
  3. Step 3: Cross multiply
    103,494.60x = 155,241.90 × 85,998.60
  4. Step 4: Simplify right side
    103,494.60x = 13,350,586,061.34
  5. Step 5: Solve for x
    x = 13,350,586,061.34/103,494.60
  6. Step 6: Final answer
    x = 128,997.90

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1.5x scale

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.