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Finding the Fourth Proportional to 133,720.40, 200,515.80 and 74,493.20

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Solution

The fourth proportional to 133,720.40, 200,515.80 and 74,493.20 is: 111,703.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,720.40 : 200,515.80 = 74,493.20 : x
  2. Step 2: Convert to fraction form
    133,720.40/200,515.80 = 74,493.20/x
  3. Step 3: Cross multiply
    133,720.40x = 200,515.80 × 74,493.20
  4. Step 4: Simplify right side
    133,720.40x = 14,937,063,592.56
  5. Step 5: Solve for x
    x = 14,937,063,592.56/133,720.40
  6. Step 6: Final answer
    x = 111,703.70

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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.