Home / 74,129.83-102,299.24-40,138.31

Finding the Fourth Proportional to 74,129.83, 102,299.24 and 40,138.31

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Solution

The fourth proportional to 74,129.83, 102,299.24 and 40,138.31 is: 55,390.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,129.83 : 102,299.24 = 40,138.31 : x
  2. Step 2: Convert to fraction form
    74,129.83/102,299.24 = 40,138.31/x
  3. Step 3: Cross multiply
    74,129.83x = 102,299.24 × 40,138.31
  4. Step 4: Simplify right side
    74,129.83x = 4,106,118,607.88
  5. Step 5: Solve for x
    x = 4,106,118,607.88/74,129.83
  6. Step 6: Final answer
    x = 55,390.91

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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.