Home / 77,140.20-115,776.04-30,425.88

Finding the Fourth Proportional to 77,140.20, 115,776.04 and 30,425.88

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Solution

The fourth proportional to 77,140.20, 115,776.04 and 30,425.88 is: 45,664.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,140.20 : 115,776.04 = 30,425.88 : x
  2. Step 2: Convert to fraction form
    77,140.20/115,776.04 = 30,425.88/x
  3. Step 3: Cross multiply
    77,140.20x = 115,776.04 × 30,425.88
  4. Step 4: Simplify right side
    77,140.20x = 3,522,587,899.92
  5. Step 5: Solve for x
    x = 3,522,587,899.92/77,140.20
  6. Step 6: Final answer
    x = 45,664.75

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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.