Home / 77,130.20-115,695.30-72,464.60

Finding the Fourth Proportional to 77,130.20, 115,695.30 and 72,464.60

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Solution

The fourth proportional to 77,130.20, 115,695.30 and 72,464.60 is: 108,696.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,130.20 : 115,695.30 = 72,464.60 : x
  2. Step 2: Convert to fraction form
    77,130.20/115,695.30 = 72,464.60/x
  3. Step 3: Cross multiply
    77,130.20x = 115,695.30 × 72,464.60
  4. Step 4: Simplify right side
    77,130.20x = 8,383,813,636.38
  5. Step 5: Solve for x
    x = 8,383,813,636.38/77,130.20
  6. Step 6: Final answer
    x = 108,696.90

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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.