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Finding the Fourth Proportional to 190,915.20, 286,372.80 and 159,811.20

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Solution

The fourth proportional to 190,915.20, 286,372.80 and 159,811.20 is: 239,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,915.20 : 286,372.80 = 159,811.20 : x
  2. Step 2: Convert to fraction form
    190,915.20/286,372.80 = 159,811.20/x
  3. Step 3: Cross multiply
    190,915.20x = 286,372.80 × 159,811.20
  4. Step 4: Simplify right side
    190,915.20x = 45,765,580,815.36
  5. Step 5: Solve for x
    x = 45,765,580,815.36/190,915.20
  6. Step 6: Final answer
    x = 239,716.80

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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.