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Finding the Fourth Proportional to 190,372.60, 285,213.30 and 155,121.40

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Solution

The fourth proportional to 190,372.60, 285,213.30 and 155,121.40 is: 232,400.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,372.60 : 285,213.30 = 155,121.40 : x
  2. Step 2: Convert to fraction form
    190,372.60/285,213.30 = 155,121.40/x
  3. Step 3: Cross multiply
    190,372.60x = 285,213.30 × 155,121.40
  4. Step 4: Simplify right side
    190,372.60x = 44,242,686,394.62
  5. Step 5: Solve for x
    x = 44,242,686,394.62/190,372.60
  6. Step 6: Final answer
    x = 232,400.49

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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.