Home / 154,083.40-231,125.10-71,139.40

Finding the Fourth Proportional to 154,083.40, 231,125.10 and 71,139.40

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Solution

The fourth proportional to 154,083.40, 231,125.10 and 71,139.40 is: 106,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,083.40 : 231,125.10 = 71,139.40 : x
  2. Step 2: Convert to fraction form
    154,083.40/231,125.10 = 71,139.40/x
  3. Step 3: Cross multiply
    154,083.40x = 231,125.10 × 71,139.40
  4. Step 4: Simplify right side
    154,083.40x = 16,442,100,938.94
  5. Step 5: Solve for x
    x = 16,442,100,938.94/154,083.40
  6. Step 6: Final answer
    x = 106,709.10

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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.