Home / 138,421.90-207,622.05-54,165.70

Finding the Fourth Proportional to 138,421.90, 207,622.05 and 54,165.70

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Solution

The fourth proportional to 138,421.90, 207,622.05 and 54,165.70 is: 81,244.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,421.90 : 207,622.05 = 54,165.70 : x
  2. Step 2: Convert to fraction form
    138,421.90/207,622.05 = 54,165.70/x
  3. Step 3: Cross multiply
    138,421.90x = 207,622.05 × 54,165.70
  4. Step 4: Simplify right side
    138,421.90x = 11,245,993,673.69
  5. Step 5: Solve for x
    x = 11,245,993,673.69/138,421.90
  6. Step 6: Final answer
    x = 81,244.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.