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Finding the Fourth Proportional to 75,301.70, 103,919.62 and 45,081.20

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Solution

The fourth proportional to 75,301.70, 103,919.62 and 45,081.20 is: 62,214.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,301.70 : 103,919.62 = 45,081.20 : x
  2. Step 2: Convert to fraction form
    75,301.70/103,919.62 = 45,081.20/x
  3. Step 3: Cross multiply
    75,301.70x = 103,919.62 × 45,081.20
  4. Step 4: Simplify right side
    75,301.70x = 4,684,821,173.14
  5. Step 5: Solve for x
    x = 4,684,821,173.14/75,301.70
  6. Step 6: Final answer
    x = 62,214.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.