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Finding the Fourth Proportional to 91,720.66, 137,619.99 and 50,119.06

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Solution

The fourth proportional to 91,720.66, 137,619.99 and 50,119.06 is: 75,199.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,720.66 : 137,619.99 = 50,119.06 : x
  2. Step 2: Convert to fraction form
    91,720.66/137,619.99 = 50,119.06/x
  3. Step 3: Cross multiply
    91,720.66x = 137,619.99 × 50,119.06
  4. Step 4: Simplify right side
    91,720.66x = 6,897,384,536.01
  5. Step 5: Solve for x
    x = 6,897,384,536.01/91,720.66
  6. Step 6: Final answer
    x = 75,199.90

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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.