Home / 78,324.05-108,089.11-42,513.97

Finding the Fourth Proportional to 78,324.05, 108,089.11 and 42,513.97

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Solution

The fourth proportional to 78,324.05, 108,089.11 and 42,513.97 is: 58,670.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,324.05 : 108,089.11 = 42,513.97 : x
  2. Step 2: Convert to fraction form
    78,324.05/108,089.11 = 42,513.97/x
  3. Step 3: Cross multiply
    78,324.05x = 108,089.11 × 42,513.97
  4. Step 4: Simplify right side
    78,324.05x = 4,595,297,179.87
  5. Step 5: Solve for x
    x = 4,595,297,179.87/78,324.05
  6. Step 6: Final answer
    x = 58,670.32

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1.5x scale

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.