Home / 257,328.90-386,030.61-79,850.21

Finding the Fourth Proportional to 257,328.90, 386,030.61 and 79,850.21

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Solution

The fourth proportional to 257,328.90, 386,030.61 and 79,850.21 is: 119,786.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,328.90 : 386,030.61 = 79,850.21 : x
  2. Step 2: Convert to fraction form
    257,328.90/386,030.61 = 79,850.21/x
  3. Step 3: Cross multiply
    257,328.90x = 386,030.61 × 79,850.21
  4. Step 4: Simplify right side
    257,328.90x = 30,824,623,344.78
  5. Step 5: Solve for x
    x = 30,824,623,344.78/257,328.90
  6. Step 6: Final answer
    x = 119,786.87

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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.