Home / 76,910.20-115,365.30-73,281.40

Finding the Fourth Proportional to 76,910.20, 115,365.30 and 73,281.40

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Solution

The fourth proportional to 76,910.20, 115,365.30 and 73,281.40 is: 109,922.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,910.20 : 115,365.30 = 73,281.40 : x
  2. Step 2: Convert to fraction form
    76,910.20/115,365.30 = 73,281.40/x
  3. Step 3: Cross multiply
    76,910.20x = 115,365.30 × 73,281.40
  4. Step 4: Simplify right side
    76,910.20x = 8,454,130,695.42
  5. Step 5: Solve for x
    x = 8,454,130,695.42/76,910.20
  6. Step 6: Final answer
    x = 109,922.10

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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.