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Finding the Fourth Proportional to 133,348.20, 199,990.30 and 77,066.60

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Solution

The fourth proportional to 133,348.20, 199,990.30 and 77,066.60 is: 115,581.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,348.20 : 199,990.30 = 77,066.60 : x
  2. Step 2: Convert to fraction form
    133,348.20/199,990.30 = 77,066.60/x
  3. Step 3: Cross multiply
    133,348.20x = 199,990.30 × 77,066.60
  4. Step 4: Simplify right side
    133,348.20x = 15,412,572,453.98
  5. Step 5: Solve for x
    x = 15,412,572,453.98/133,348.20
  6. Step 6: Final answer
    x = 115,581.41

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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.