Home / 77,130.20-115,724.10-30,415.64

Finding the Fourth Proportional to 77,130.20, 115,724.10 and 30,415.64

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Solution

The fourth proportional to 77,130.20, 115,724.10 and 30,415.64 is: 45,634.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,130.20 : 115,724.10 = 30,415.64 : x
  2. Step 2: Convert to fraction form
    77,130.20/115,724.10 = 30,415.64/x
  3. Step 3: Cross multiply
    77,130.20x = 115,724.10 × 30,415.64
  4. Step 4: Simplify right side
    77,130.20x = 3,519,822,564.92
  5. Step 5: Solve for x
    x = 3,519,822,564.92/77,130.20
  6. Step 6: Final answer
    x = 45,634.82

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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.