Home / 74,391.72-102,656.88-42,121.32

Finding the Fourth Proportional to 74,391.72, 102,656.88 and 42,121.32

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Solution

The fourth proportional to 74,391.72, 102,656.88 and 42,121.32 is: 58,125.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,391.72 : 102,656.88 = 42,121.32 : x
  2. Step 2: Convert to fraction form
    74,391.72/102,656.88 = 42,121.32/x
  3. Step 3: Cross multiply
    74,391.72x = 102,656.88 × 42,121.32
  4. Step 4: Simplify right side
    74,391.72x = 4,324,043,292.68
  5. Step 5: Solve for x
    x = 4,324,043,292.68/74,391.72
  6. Step 6: Final answer
    x = 58,125.33

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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.