Home / 259,334.91-388,988.60-79,420.28

Finding the Fourth Proportional to 259,334.91, 388,988.60 and 79,420.28

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Solution

The fourth proportional to 259,334.91, 388,988.60 and 79,420.28 is: 119,126.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,334.91 : 388,988.60 = 79,420.28 : x
  2. Step 2: Convert to fraction form
    259,334.91/388,988.60 = 79,420.28/x
  3. Step 3: Cross multiply
    259,334.91x = 388,988.60 × 79,420.28
  4. Step 4: Simplify right side
    259,334.91x = 30,893,581,186.76
  5. Step 5: Solve for x
    x = 30,893,581,186.76/259,334.91
  6. Step 6: Final answer
    x = 119,126.20

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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.