Home / 74,130.40-102,299.78-40,138.90

Finding the Fourth Proportional to 74,130.40, 102,299.78 and 40,138.90

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Solution

The fourth proportional to 74,130.40, 102,299.78 and 40,138.90 is: 55,391.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,130.40 : 102,299.78 = 40,138.90 : x
  2. Step 2: Convert to fraction form
    74,130.40/102,299.78 = 40,138.90/x
  3. Step 3: Cross multiply
    74,130.40x = 102,299.78 × 40,138.90
  4. Step 4: Simplify right side
    74,130.40x = 4,106,200,639.44
  5. Step 5: Solve for x
    x = 4,106,200,639.44/74,130.40
  6. Step 6: Final answer
    x = 55,391.59

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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.