Home / 74,130.39-102,299.79-40,138.91

Finding the Fourth Proportional to 74,130.39, 102,299.79 and 40,138.91

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Solution

The fourth proportional to 74,130.39, 102,299.79 and 40,138.91 is: 55,391.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,130.39 : 102,299.79 = 40,138.91 : x
  2. Step 2: Convert to fraction form
    74,130.39/102,299.79 = 40,138.91/x
  3. Step 3: Cross multiply
    74,130.39x = 102,299.79 × 40,138.91
  4. Step 4: Simplify right side
    74,130.39x = 4,106,202,063.83
  5. Step 5: Solve for x
    x = 4,106,202,063.83/74,130.39
  6. Step 6: Final answer
    x = 55,391.62

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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.