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Finding the Fourth Proportional to 75,369.17, 103,979.85 and 45,155.76

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Solution

The fourth proportional to 75,369.17, 103,979.85 and 45,155.76 is: 62,297.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,369.17 : 103,979.85 = 45,155.76 : x
  2. Step 2: Convert to fraction form
    75,369.17/103,979.85 = 45,155.76/x
  3. Step 3: Cross multiply
    75,369.17x = 103,979.85 × 45,155.76
  4. Step 4: Simplify right side
    75,369.17x = 4,695,289,151.44
  5. Step 5: Solve for x
    x = 4,695,289,151.44/75,369.17
  6. Step 6: Final answer
    x = 62,297.22

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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.