Home / 231,138.40-346,707.60-142,103.20

Finding the Fourth Proportional to 231,138.40, 346,707.60 and 142,103.20

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Solution

The fourth proportional to 231,138.40, 346,707.60 and 142,103.20 is: 213,154.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,138.40 : 346,707.60 = 142,103.20 : x
  2. Step 2: Convert to fraction form
    231,138.40/346,707.60 = 142,103.20/x
  3. Step 3: Cross multiply
    231,138.40x = 346,707.60 × 142,103.20
  4. Step 4: Simplify right side
    231,138.40x = 49,268,259,424.32
  5. Step 5: Solve for x
    x = 49,268,259,424.32/231,138.40
  6. Step 6: Final answer
    x = 213,154.80

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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.