Home / 257,418.12-386,123.05-79,925.31

Finding the Fourth Proportional to 257,418.12, 386,123.05 and 79,925.31

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Solution

The fourth proportional to 257,418.12, 386,123.05 and 79,925.31 is: 119,886.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,418.12 : 386,123.05 = 79,925.31 : x
  2. Step 2: Convert to fraction form
    257,418.12/386,123.05 = 79,925.31/x
  3. Step 3: Cross multiply
    257,418.12x = 386,123.05 × 79,925.31
  4. Step 4: Simplify right side
    257,418.12x = 30,861,002,338.97
  5. Step 5: Solve for x
    x = 30,861,002,338.97/257,418.12
  6. Step 6: Final answer
    x = 119,886.67

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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.